MCQs In Higher Secondary Physics

Monday, June 23, 2014

NOTE : Each set contains 30 questions. Time limit is 45 minutes.

The quality, or timbre, of a musical sound is due to...

[A] its fundamental frequency  [B] its overtone structure
[C] its amplitude              [D] the presence of beats

If θ is the inclination and μ_s, the coefficient of static friction, then a cylinder can roll on the inclined plane without slipping for...
```
[A] μ_s ≥ tanθ [B] μ_s ≥ (tanθ)/3 [C] μ_s ≥ (1/tanθ) [D] μ_s ≥ (1/3tanθ)
```

The moment of inertia of a rigid body is...

[A] always constant                [B] does not change generally 
[C] depends on number of particles [D] different for different axes

Ball A is thrown horizontally and ball B is dropped from the same height at the same moment. Then...

[A] A reaches the ground first 
[B] B reaches the ground first
[C] A has greater speed when it reaches the ground
[D] B has greater speed when it reaches the ground

If for the planets in the solar system, r is the radius of the orbit and T is the periodic time, then the ratio r³/t² is...
```
[A] 1 [B] same for all planets [C] more for farther planets [D] less for farther planets
```
The adiabatic equation for the ideal gas, PV^γ = constant can also be written as...
```
[A] PV = γ [B] PT^γ = constant [C] T^γ/P^{γ - 1} = constant [D] PV^γT^γ = R
```

In any process, the maximum amount of mechanical energy that can be converted to heat...

[A] depends only on the intake temperature [B] depends only on the exhaust temperature
[C] depends on the compression ratio       [D] is 100%

Electrical energy in the form of electric current is converted into _____ when a storage battery is charged.
```
[A] electrical [B] thermal [C] chemical [D] light
```
The power consumed by a resistance that obeys Ohm's law is given by...
```
[A] P = V²/R [B] P = V²R [C] P = IR [D] P = IR²
```

Faraday's constant is...

[A] 96487 coulomb/g [B] 96487 coulomb/mole [C] 964870 coulomb/g [D] 964870 coulomb/mole

When the lead storage cell is fully charged, its voltage and specific gravity of electrolyte, respectively are...
```
[A] 2.1 V, 1.825 [B] 1.5 V, 1.825 [C] 2.1 V, 1.285 [D] 1.5 V, 1.285
```
A voltmeter should have a very ____ resistance and should be connected in ____.
```
[A] large, parallel [B] large, series [C] small, parallel [D] small, series
```

I₁ and I₂ are currents in primary and secondary coils respectively, of a step-up transformer. Then...

[A] I₁ is smaller than I₂
[B] I₁ is smaller than or equal to I₂
[C] I₁ is greater than I₂
[D] I₁ greater than or equal to I₂

If A is the area of a coil of N turns rotating with angular speed ω in a uniform magnetic field B, then the instantaneous value of e.m.f. generated in the coil is...
```
[A] NABω [B] NABω sint [C] NABω sinωt [D] NABω cost
```
In an LCR circuit resonance occurs at the frequency for which...
```
[A] X_L > X_C [B] X_L < X_C[C] X_L - X_C = 0 [D] X_L = 0
```

λ (wavelength) of visible light is...

[A] more than λ of ultraviolet light [B] more than λ of infra-red light
[C] less than λ of X-rays            [D] more than λ of microwaves

The phase difference between two waves superimposing at a point for destructive interference to occur should be...
```
[A] nπ [B] 2nπ [C] (2n + 1)π/2 [D] (2n + 1)π
```

Diffraction in visible light is harder to observe because of...

[A] low frequencies [B] high velocity [C] visibility [D] short wavelength

The charge to mass ratio (specific charge) for an electron (in coulomb/kg) is approximately equal to...
```
[A] 1.76 x 10^-11 [B] 1.76 x 10¹¹ [C] 1.76 x 10^-8 [D] 1.76 x 10⁸
```
If V_s is the stopping potential and e is the charge on electron, the energy required by the electron to cross over this potential difference is...
```
[A] V_s/e²[B] V_s/e [C] (V_s)²/e [D] V_s . e
```
The change of energy level is always accompanied by the emission or absorption of radiation depending upon the size of...
```
[A] the energy change [B] the atom [C] the nucleus [D] the electron
```
In the hydrogen spectrum, the series obtained in the ultraviolet region is...
```
[A] Balmer series [B] Lyman series [C] Paschen series [D] Pfund series
```

In an N-type semiconductor...

[A] free electron density exceeds hole density [B] hole density exceeds free electron density
[C] free electrons are absent                  [D] holes are absent

A diode allows electric current...

[A] to increase                   [B] to decrease 
[C] to flow in one direction only [D] to flow alternately in both directions

Two forces 2i - 3j and _____ have a resultant 5i + 4j.
```
[A] 7i + j [B] -3i - 7j [C] 3i + 7j [D] 7i + 7j
```
If the magnitude of electromagnetic force is 1, the relative strength of strong force is...
```
[A] 10^-2 [B] 10^-1 [C] 10 [D] 10²
```

During an interaction of two particles, the changes produced in velocity are always...

[A] constant               [B] equal for both particles 
[C] in opposite directions [D] in direct proportion to their weights

Which of the following is not a unit of power?

[A] joule.second [B] watt [C] horsepower [D] newton.meter/second

A 1 kg mass has a P.E. of 1 joule relative to the ground when it is at a height of about...
```
[A] 0.12 m [B] 1.0 m [C] 9.8 m [D] 32 m
```

An object in motion need not have...

[A] velocity [B] momentum [C] K.E. [D] P.E.

Tuesday, April 1, 2014

NOTE : Each set contains 30 questions. Time limit is 45 minutes.

Intermolecular forces are attractive when the separation of molecules is...

[A] more than the equilibrium separation [B] less than the equilibrium separation
[C] equal to the equilibrium separation  [D] zero

The inter atomic potential is dependent on...

[A] the shape of the atoms only                       [B] the distance between the atoms only 
[C] both the shape and the distance between the atoms [D] none of above

The shear stress that acts on an object affects its...
```
[A] length [B] width [C] volume [D] shape
```

The only elastic modulus that applies to liquids is...

[A] Young's modulus [B] Shear modulus [C] modulus of rigidity [D] bulk modulus

In the steady flow, the streamlines...

[A] do not exist          [B] are fixed in number 
[C] intersect one another [D] do not intersect one another

If the radius of a pipe is increased by 50%, the fluid velocity v becomes...
```
[A] (3/2).v [B] (2/3).v [C] (4/9).v [D] (9/4).v
```
The average speed of the molecules in a bottle of gas at pressure P and absolute temperature T is doubled. The new pressure and temperature are, respectively...
```
[A] 2P, 2T [B] 4P, 4T [C] 4P, 2T [D] 2P, 4T
```

In the equation, PV = constant, the value of the constant depends on...

[A] the temperature of the gas              [B] the mass of the gas 
[C] the temperature and the mass of the gas [D] the temperature and the pressure of the gas

For water, triple point occurs at...

[A] 76 mmHg, 273.16K [B] 76 mmHg, 273.16°C [C] 4.58 mmHg, 273.16K [D] 4.58 mmHg, 273.16°C

The density of water is maximum at...
```
[A] 0°C [B] 4°C [C] 30°C [D] 32°F
```

Dipole moment is...

[A] a scalar               [B] a vector from -q to +q 
[C] a vector from +q to -q [D] a vector perpendicular to the distance vector

If an ebonite rod is rubbed with fur...

[A] the rod gets electrified                 [B] the fur gets electrified 
[C] both the fur and the rod get electrified [D] none gets electrified

For a magnet placed in a magnetic field, the maximum torque occurs when the axis of the magnet is...

[A] perpendicular to the field   [B] parallel to the field
[C] inclined at 45° to the field [D] inclined at 180° to the field

Optical fibres use the principle of...

[A] refraction                [B] total internal refraction
[C] total internal reflection [D] total internal absorption

When light travels in different materials...

[A] the wavelength remains constant [B] the frequency remains constant
[C] the velocity remains constant   [D] none of three remains constant

If a star A is two magnitudes brighter than star B, we say that A is _____ times brighter than B.
```
[A] 2 [B] 2 x 2.512 [C] 2.512 x 2.512 [D] 100
```
If λ₀ is emitted wavelength, λ is measured wavelength and Z is the displacement of spectral line, then...
```
[A] Z = (λ₀ - λ)/λ [B] Z = (λ₀ - λ)/λ₀ [C] λ = λ₀ (Z + 1) [D] λ₀ = λ(Z + 1)
```
The magnitude of vector 2i - 3j + √ 3.k is...
```
[A] 2 [B] 3 [C] √ 2 [D] 4
```
The M.I. of a disc about an axis passing through its centre and perpendicular to its plane is 100 gm.cm². Then, its M.I. about its diameter is...
```
[A] 100 gm.cm² [B] 50 gm.cm² [C] 200 gm.cm² [D] 25 gm.cm²
```
A ring , a disc and a sphere, all of same mass and radius, rotate with the same angular velocity about their diameter. Which has maximum rotational kinetic energy?
```
[A] Ring [B] Disc [C] Sphere [D] All have same kinetic energy
```

If the earth stops rotating, the value of 'g' will...

[A] increase [B] decrease [C] not change [D] become zero

A parrot resting on a floor of an air-tight box, which is being carried by a girl starts flying. The girl will feel that the box...
```
[A] is now lighter [B] is now heavier [C] shows no change in weight [D] is also flying
```
The thermal resistance of a metal block of length l, area of cross-section A and thermal conductivity k is...
```
[A] l/(k.A) [B] l.A/k [C] k.A/l [D] k.l/A
```
The equivalent thermal conductivity of a slab consisting of two parallel layers of two different materials of thermal conductivity K₁ and K₂ is...
```
[A] K₁ + K₂ [B] K₁.K₂ [C] (K₁ + K₂)/2 [D] (2K₁ + K₂)/(K₁ + K₂)
```
A sphere, a cube and a thin circular plate, all made of same material and of same mass are heated to a temperature of 100°C. Which of these cools faster when left in air at room temperature?
```
[A] Sphere [B] Circular plate [C] Cube [D] All of them at the same rate
```

No energy is transmitted in a...

[A] longitudinal progressive wave [B] stationary wave 
[C] transverse progressive wave   [D] electromagnetic wave

The velocity of sound in air is V. At what speed a source must travel towards a listener at rest so that the apparent frequency heard is double the true frequency of the source?
```
[A] V/2 [B] V/4 [C] 2V [D] 4V
```
A spring with force constant k is cut in half. Each of the new springs has a force constant of...
```
[A] k/2 [B] k [C] 2k [D] √ 2.k
```
A harmonic oscillator of mass 40 g has a period of 10 seconds. To reduce the period to 5 seconds, the mass should be changed to...
```
[A] 10 g [B] 20 g [C] 80 g [D] 160 g
```

An example of a purely longitudinal wave is...

[A] a sound wave [B] an electromagnetic wave 
[C] a water wave [D] a wave in a stretched string

Saturday, March 29, 2014

NOTE : Each set contains 30 questions. Time limit is 45 minutes.

Maximum reinforcement of two waves is obtained at points with phase difference of...
```
[A] nπ [B] nπ/2 [C] 2nπ [D] (2n + 1)π/2
```

If 'd' is the width of slit, the diffraction is greater for...

[A] larger d, larger λ  [B] larger d, smaller λ 
[C] smaller d, larger λ [D] smaller d, smaller λ

The SI unit of Planck's constant is...
```
[A] J [B] J/s [C] J.s [D] J/s.K
```

The energy of an electron depends on...

[A] its distance from the nucleus [B] the diameter of the nucleus 
[C] its diameter                  [D] its charge

Which of the following is not the spectral series obtained in the hydrogen spectrum?
```
[A] Balmer series [B] Pascal series [C] Pfund series [D] Paschen series
```

The conductivity of a semiconductor can be changed by adding impurities and by...

[A] changing its size [B] changing its shape [C] changing its density [D] irradiation

A body falling from rest covers a distance h/2 in the last second of its fall. Then the height h from which it falls is...
```
[A] 9.8 m [B] 58.28 m [C] 100/√ 2 m [D] 50/√ 2 m
```
The two ends of a train moving with uniform acceleration pass a certain point with velocities v₁ and v₂. The velocity with which the middle point of the train passes the same point is...
```
[A] √(v₁² + v₂²)/2 [B] √(v₁² - v₂²)/2 [C] √(v₂² - v₁²)/2 [D] (v₁ + v₂)/2
```
The angle which the vector 3i + 4j makes with X-axis is...
```
[A] 30° [B] 45° [C] tan^-1 (4/3) [D] tan^-1 (3/4)
```
Two bodies of equal mass are in uniform circular motion with the same period.If r₁ and r₂ are the radii of their circular paths then the ratio of their centripetal force is...
```
[A] r₁² / r₂² [B] r₂² / r₁² [C] r₁ / r₂ [D] r₂ / r₁
```
A ball is dropped from a vertical height 'h' on the ground. If 'e' is the coefficient of restitution then the height to which the ball goes up after it rebounds for n-th time is...
```
[A] h/(eⁿ) [B] h/(e²ⁿ) [C] h.(eⁿ) [D] h.(e²ⁿ)
```
Water falls on the blades of a turbine at the rate of 10 kg/s from a height of 10 m. The power delivered to the turbine is...(take g = 10 m/s²)
```
[A] 1 W [B] 1 kW [C] 100 W [D] 100 kW
```
An electric fan has a blade of length l. The fan makes n rotations in one minute. The acceleration of a point on the tip of the blade is...
```
[A] 4π².l/n [B] 4π².l.n²/(60 x 60) [C] 4π².l.n²/60 [D] 4π².l/60n
```
A body of mass m slides down an incline and reaches the bottom with velocity v. If a ring of same mass rolls down the same incline then the velocity of the ring at the bottom is...
```
[A] v [B] 2v [C] v/√ 2 [D] (√ 2)v
```
The gravitational force between two particles of mass 2 kg each separated by a distance 2m is...
```
[A] 6.67 x 10^-11 N [B] 0 [C] 3.335 x 10^-11 N [D] 13.34 x 10^-11 N
```
The period of revolution of a satellite in a circular orbit of radius r is T. The period of the same satellite in another circular orbit of radius 4r is...
```
[A] T/4 [B] T/8 [C] 2T [D] 8T
```
If K is Boltzmann's constant, the average kinetic energy of a molecule of a perfect gas is...
```
[A] 2/3 kT [B] 2.5 kT [C] 3.5 kT [D] 1.5 kT
```
The efficiency of a Carnot engine working between constant high temperature T₁ and constant low temperature T₂ is maximum when...
```
[A] T₁ and T₂ are high       [B] T₁ is high and T₂ is low 
[C] T₂ is high and T₁ is low [D] T₁ and T₂ equal
```

A cooking vessel must have...

[A] high thermal conductivity and high specific heat 
[B] low thermal conductivity and low specific heat
[C] high thermal conductivity and low specific heat
[D] low thermal conductivity and high specific heat

The total energy of a particle executing SHM is 100 J.Then the maximum value of kinetic energy is...
```
[A] 50 J [B] 100 J [C] 25 J [D] 10 J
```
When a mass m is suspended from a spring its period of oscillation is one second. If the mass is reduced to m/2, the new period will be...
```
[A] 1 second [B] 1/2 second [C] √ 2 second [D] 1/(√ 2) second
```
Which of the following quantities can be considered as the fundamental quantity of a wave?
```
[A] Velocity [B] Frequency [C] Wavelength [D] Amplitude
```

In a stationary wave, strain is...

[A] maximum at node [B] maximum at antinode 
[C] minimum at node [D] equal at nodes and antinodes

Dimensions of momentum are...

[A] M¹L¹T¹ [B] M¹L¹T^-2 [C] M¹L^-1T^-2 [D] M¹L^-1T^-1

When a 1-N force acts on a 1-N object that is able to move freely, the object receives...

[A] a speed of 1 m/s           [B] an acceleration of 1.02 m/s² 
[C] an acceleration of 1 m/s²  [D] an acceleration of 9.8 m/s²

The coefficient of static friction for steel on ice is...
```
[A] 0.1 [B] 0.1 N [C] 0.1 Nm [D] 0.1 N.kg^-1
```

The work done in moving an object from A to B against a non-conservative force

[A] cannot be recovered by moving it from B to A
[B] does not depend on the path taken between A and B 
[C] is always entirely converted in to  heat 
[D] disappears forever

Car A has mass of 1000 kg and speed of 60 kmph. Car B has mass of 2000 kg and speed of 30 kmph. The kinetic energy of car A is...
```
[A] half that of car B  [B] equal to that of car B
[C] twice that of car B [D] four times that of car B
```

Brownian motion increases as...

[A] the particle size increases [B] the viscosity of the medium increases
[C] the temperature increases   [D] the temperature decreases

The equilibrium separation between the molecules corresponds to...

[A] maximum potential energy [B] minimum potential energy
[C] zero potential energy    [D] zero kinetic energy

Saturday, March 15, 2014

NOTE : Each set contains 30 questions. Time limit is 45 min.

A child pulls a toy car weighing 0.20 kg across a smooth floor by means of a string attached to it. If the string makes an angle of 60° to the floor and the child pulls with a force of 2.0 N, then the amount of work he does in pulling the car a distance of 5.0 m is...

5.0 J
10.0 J
12.7 J
17.3 j

The note middle C played on a piano always differs from middle C played on a violin because of a difference in...

frequency
wavelength
fundamentals
harmonics

chromatic aberration of a lens is caused by...

diffraction
diffusion
dispersion
interference

The molar gas constant is the same for all gases because, at the same pressure and temperature, equal volumes of gases have the same...

number of molecules
average kinetic energy
density
mass

A Hall probe is used to determine...

the magnetic moment of a coil
the susceptibility of a material
relative permittivity
magnetic flux density

In a nuclear fission reactor, graphite is often used for...

absorbing neutrons and controlling the reaction
slowing down neutrons
preventing the radiation from escaping into atmosphere
all the above

In a Newton's rings experiment, the thickness of the air space between the lens and the glass plate is 1.8 x 10^-6 m for the sixth dark ring. The wavelength of the light used is...

1.7 x 10^-8 m
3.0 x 10^-7 m
6.0 x 10^-7 m
6.0 x 10^-5 m

If α denotes the current gain of a transistor in the common-base mode of operation and β denotes the current gain in the common-emitter mode, then α and β are related by...

α = β/(1 + β)
α = (1 + β)/β
α = (1 - β)/β
β = (1 + α)/α

A certain metal has a work function of 2 eV. Taking Planck's constant h = 6.6 x 10²⁴ J.s, charge on electron e = 1.6 x 10^-19 C and velocity of light C = 3 x 10⁸ m/s, what is its approximate threshold frequency?

5 x 10¹³ Hz
5 x 10¹⁴ Hz
5 x 10¹⁵ Hz
2 x 10¹⁵ Hz

A monoatomic gas is allowed to expand adiabatically until its volume is eight times greater. Compared to the original pressure, the new pressure must be smaller by a factor of...

4
8
16
32

During a negative β-decay...

an atomic electron is ejected
an electron which is already present within the nucleus is ejected
a neutron in the nucleus decays emitting an electron
a part of the binding energy of the nucleus is converted into an electron

A parallel plate capacitor is charged and the charging battery is then disconnected. If the plates of the capacitor are moved farther apart by means of insulating handles...

the charge on the capacitor increases
the voltage across the plates increases
the capacitance increases
the electrostatic energy stored in the capacitor increases

Two bodies M and N of equal masses are suspended from two separate massless springs of spring constants K₁ and K₂, respectively. If the two bodies oscillate vertically such that their maximum velocities are equal, then the ratio of the amplitude of vibration of M to that of N is...

K₁/K₂
√(K₁/K₂)
K₂/K₁
√(K₂/K₁)

Two coherent monochromatic light beams of intensities I and 4I are superimposed. The maximum and minimum intensities in the resulting beam are...

5I, I
5I, 3I
9I, I
9I, 3I

A vessel contains oil (density = 0.8 g/cm³) over mercury (density = 13.6 g/cm³). A homogeneous sphere floats with half its volume immersed in mercury and other half in oil.The density of the material of the sphere in g/cm³ is...

3.3
6.4
7.2
12.8

An organ pipe P¹ closed at one end vibrating in its first harmonic and another pipe P² open at both ends vibrating in its third harmonic are in resonance with a given tuning fork. The ratio of the length of P¹ to that of P² is...

8 : 3
3 : 8
1 : 2
1 : 3

Two particles x and y have equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii R₁ and R₂, respectively. The ratio of the mass of x to that of y is...

(R₁/R₂)^1/2
R₂/R₁
(R₁/R₂)²
R₁/R₂

A feably prepared radioactive source of half life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to work safely with this source is...

6 h
12 h
24 h
128 h

A nuclear bomb explodes 200 km above the surface of moon. The sound of explosion on the moon will...

be heard before the flash of explosion is seen
be heard at the same time explosion occurs
be heard after the explosion
not be heard at all

A blue colour star is...

hotter than white star
cooler than white star
at the same temperature as white star
at 0 K temperature

The position of a particle at time t is √ x = 10 + t, then...

velocity is constant
velocity α t
acceleration α t
acceleration is zero

The maximum height and range of a projectile are equal when the angle of projection is...

45
60
tan^-1 (1/4)
tan^-1 4

A force of 140 N acts on a body of mass 100 kg. If the frictional force is 40 N, then the acceleration of the body is ______ m/s²

1
180
18
1.8

The work done by centripetal force(F) on a particle of mass m moving round a circle of radius r with a uniform sped of v is

F x r
F x 2πr
zero
F x v

When a sphere rolls without slipping the ratio of translational kinetic energy to total kinetic energy is...

3 : 7
1 : 1
7 : 5
5 : 7

When a satellite revolves round the earth in an orbit very close to earth its orbital velocity is...

11.2 m/s
11.2 km/s
8 m/s
8 km/s

The diameter of a water molecule is _____ A°.

1.5
2
1
3

To produce longitudinal extension we should exert force in...

one direction only
two directions
perpendicular to the body in all directions
parallel to the body

A metal sphere has a spherical cavity in it. When the ball is heated the volume of cavity will...

increase
decrease
not change
depend on mass of sphere

A weightless spring of force constant 5 N/m is cut into two equal halves and the two are connected in parallel. The equivalent force constant of the system in N/m is...

5
10
15
20

MCQ : set #11

NOTE : Each set contains 30 questions. Time limit is 45 min.

For an object performing SHM the magnitude of maximum velocity is given by...

ω √(A² - y²)
ω √(y² - A²)
ωA
ω²A

The reciprocal of wavelength is called...

frequency
wave velocity
amplitude
wave number

______ is for rotational motion as mass is for linear motion.

mass
torque
moment of inertia
inertia

If m is the mass of a planet, r is radius of its orbit, ω is the angular velocity and v is its linear velocity, then the force acting on planet is...

mrv²
mr²V²
mrω²
mr²ω²

In a fuel cell the conversion of chemical energy into electrical energy takes place...

at both electrodes
at the anode only
at the cathode only
in the electrolyte

Which of the following is not the unit of magnetic flux?

weber
tesla-m²
m²kgs^-1
henry

Impulse is equal to...

momentum
change in momentum
change in momentum per unit time
change in momentum per unit mass

1 kWh is equal to...

746 W
3.6 x 10⁶ J
3.6 hp
746 kW

The atomic mass of copper is 64 and its density is 9.0 g/cm³. The volume of one mole of atoms of copper is _____ g/cm³.

6.023 x 10²³
(6.023 x 9 x 10²³)/64
(6.023 x 64 x 10²³)/9
64/9

Young's modulus for aluminium is 7 x 10¹⁰ Pa. The force needed to stretch, an aluminium wire with 2 mm diameter and 800 mm length, by 1 mm is...

2.75 N
275 N
1.10 N
275 kN

The MKS unit of coefficient of viscosity is...

poise
centipoise
Pa second^-1
Pa second

Electric charge is quantized. This means that the electric charge...

is not continuous
is continuous
is constant
has mass

A 2 kg ball moves with a speed of 8 m/s and collides with a 4 kg ball moving in the same direction with a speed of 2 m/s. After the collision, the heavier ball has a speed of 5 m/s. The collision results in a decrease in the total kinetic energy of translation of two balls of...

0 J
6 J
12 J
18 j

The result of combining two mutually perpendicular vibrations was first extensively studied by...

Huygens
Lissajon
Sabine
Newton

On a sunny day you may see very bright lines formed on the bottom of a swimming pool. The prime cause of these is...

absorption
diffraction
interference
refraction

A piece of glass which has been heated to a high temperature is left to cool. If the glass cracks, it will most likely be because of...

low thermal conductivity of glass
high thermal conductivity of glass
low specific heat capacity of glass
high specific heat capacity of glass

The charge to mass ratio of an electron is about 1.8 x 10¹¹ C kg^-1. In a certain television tube, where the accelerating voltage is 1600V, the electrons have a speed just before striking the screen of approximately...

16000 kms^-1
20000 kms^-1
24000 kms^-1
28000 kms^-1

A mass spectrometer may be used to distinguish between...

different elements
different isotopes
identical isotopes bearing different charge
all of the above

If a train is to move with velocity of light, its length would be

infinite
unchanged
zero
half the original

A radio-station broadcasts at 30 m band. The frequency of electromagnetic waves transmitted from this station could be...

10 MHz
10 kHz
3 x 10¹⁰ Hz
11 x 10¹¹ Hz

The energy generation in stars is due to...

fusion of heavy nuclei
fusion of light nuclei
chemical reaction
fission of heavy nuclei

Two resistances are joined in parallel whose resultant is 6/5 ohm. One of the resistance wires is broken and the effective resistance becomes 2 ohm. The resistance in ohm of the wire that got broken is...

2
3
3/5
6/5

When the distance between a source and a cliff is 'd', the time taken to hear the first echo of sound with velocity 'V' is...

V.d
2V/d
2d/V
d/V

Which of the following pairs of physical quantities have the same unit?

Force and power
Stress and strain
Young's modulus and pressure
Coefficient of viscosity and surface tension

The area enclosed by the displacement-time graph of a body thrown in air gives...

average speed
average velocity
acceleration
no significant physical quantity

A particle is moving eastwards with a velocity of 5 m/s. In 10 seconds the velocity changes to 5 m/s northwards. The average acceleration in this time is...

zero
(1/√ 2) m/s² towards northwest
(1/√ 2) m/s² towards northeast
(1/2) m/s² towards northwest

Swimming becomes possible because of _____ law of motion.

First
Second
Third
none of the three

A thin film of liquid is enclosed between two glass plates. It is difficult to separate the plates on account of...

Viscosity
Surface tension
Friction
Atmospheric pressure

The highest temperature that can be recorded by a mercury thermometer is...

100°C
157°C
257°C
357°C

A tuning fork originally in unison with another fork of frequency 260 Hz, produces 4 beats per second, when a little wax is attached to it. What is the frequency now?

260 Hz
264 Hz
256 Hz
262 Hz

MCQ : Set #10

NOTE : Each set contains 30 questions. Time limit is 45 min.

A toy for firing a ball vertically consists of a spring which is compressed 0.10 m by an average force of 5.0 N. If a ball of mass 0.05 kg is placed on the spring and the spring released, the ball will reach a height of ...

1.0 m
1.2 m
1.4 m
1.6 m

A horizontal rope is fixed at one end. The other end is held in the hand and a wave motion is generated by moving the hand up and down repeatedly. A stationary wave is formed and it is observed that a small piece of ribbon tied to the rope is about half way between a node and an adjacent antinode. The movement of the ribbon is...

up and down
back and forth
a combination of A & B
impossible to determine

In an astronomical telescope, the objective lens forms an image that is...

real and erect
real and inverted
virtual and erect
virtual and inverted

The specific latent heat of vaporisation of water is 2.3 x 10⁶ J/kg. The percentage of this energy that is necessary to overcome atmospheric pressure is...

0
between 0 and 50%
50%
between 50 and 100%

The electron-volt is a measure of...

charge
current
potential
energy

In which of the following units could Planck's constant be expressed?

joule
joule-hertz
joule-second
newton-second

The capacitance of a parallel plate capacitor would be decreased by...

increasing the separation of the plates
increasing the area of overlap of the plates
replacing the air between the plates by paper
replacing the air between the plates by mica

Two light sources have exactly the same frequency and are always exactly out of step with each other. This is an example of...

phase reversal
Huygen's principle
coherence
destructive interference

Two bodies of mass m₁ and m₂ are moving with equal kinetic energy.The ratio of their linear momentum P₁ : P₂ is...

m₁ : m₂
m₂ : m₁
m₁² : m₂²
√m₁ : √m₂

The force required to make the length of a wire three times its original length is ____ when the area of cross-section is unity and Y is the Young's modulus.

2Y
3Y
Y
Y/2

The first law of thermodynamics is a special case of...

law of conservation of momentum
law of conservation of energy
Boyle's law
Charles' law

If the velocity of sound in air at 0°C is 300 m/s, at what temperature will the velocity be 400 m/s?

330°C
485°C
674°C
1000°C

A ray of light incident on a 60° angled prism of refractive index √ 2, suffers minimum deviation. The angle of incidence is...

75°
0°
45°
60°

Two equal negative charges(-q) are fixed at two points (0,a) and (0,-a) on the Y-axis. A positive charge q is released from rest at the point (2a,0) on the X-axis. The charge q will...

execute SHM about the origin
move to the origin and remain at rest
move to infinity
execute oscillatory motion but not SHM.

Ball-point pen functions on the principle of

viscosity
Boyle's law
gravitational force
surface tension

A soap bubble has a radius of 3 cm. The surface tension of soap solution is 1.5 x 10^-2 N/m. The excess of pressure (in N/m²) is equal to...

1
2
0.5 x 10^-2
1.0 x 10^-2

In case of a prism, the angle of deviation is greater for...

violet
red
blue
green

A piece of copper and another of germanium are cooled from room temperature to 80K. The resistance of...

each of them increases
each of them decreases
copper increases and germanium decreases
copper decreases and germanium increases

Which of the following is always attractive?

Strong force
Electrostatic force
Magnetic force
None of the three

A non-conservative force does not give rise to...

thermal energy
kinetic energy
light energy
potential energy

If E_A is the energy required for the equilibrium separation of two hydrogen atoms in a molecule of hydrogen and E_M is the energy required for the equilibrium separation of two molecules of hydrogen, then...

E_A = E_M
E_A = E_M/(√ 2)
E_A > E_M
E_A < E_M

When pressure of 2.0 MPa is applied to a sample of kerosene, it contracts by 15%. The bulk modulus of kerosene is...

1.7 MPa
1.997 MPa
2.003 MPa
1.3 GPa

A wetting agent...

reduces angle of contact
increases angle of contact
increases surface tension
increases surface area

When a slab of insulating material is introduced in a capacitor, its capacitance

becomes zero
decreases considerably
increases considerably
does not change

For a constant-length pendulum, the periodic time depends on

amplitude
length
mass of pendulum
'g'

The amplitude of a sound wave determines its...

pitch
loudness
overtones
resonance

The value of 'g' at pole is...

greater than that at the equator
smaller than that at the equator
equal to that at the equator
zero

Which of the following engines is the most efficient?

gasoline
diesel
gas turbine
Carnot

A 50-V battery is connected across a 10-ohm resistor and a current of 4.5 A flows. The internal resistance of the battery is...

0
0.5 ohm
1.1 ohm
5 ohm

In an LCR series circuit Q-factor is given by...

1/√LC
√(L/C)
(1/R).√(L/C)
R/(√LC)

MCQ : Set #9

NOTE : Each set contains 30 questions. Time limit is 45 min.

The error in measuring the radius of a sphere is 2%. Then the error in the measurement of its volume is...

8%
6%
2%
9%

A magician is throwing rings into air in such a way that when a ring is at its maximum height he throws another ring. If the time difference between each throw is 1 sec then the height attained by the ring is...

49 m
49 cm
9.8 m
4.9 m

If the mass and force are doubled then the acceleration will...

double
become thrice
become four times
remain same as before

A string is tied to the neck of a bottle containing soda water and then whirled in a vertical circle. The bubbles will be found...

near the neck
at the bottom
at the centre
everywhere in the bottle

If the absolute temperature of a gas is doubled, then V_rms will become

2 times
√ 2 times
1/2 times
4 times

When the temperature of a black body is lowered to half its original value then the amount of heat radiated will be reduced to...

1/2
1/4
1/8
1/16

A shell is fired from a cannon with a velocity V at an angle θ with the horizontal direction. At the highest point in its path it explodes into two pieces of equal mass. One of the pieces retraces its path to the cannon then the speed of the other immediately after the explosion is...

3Vcosθ
2Vcosθ
3/2
(√ 3)Vcosθ/2

X-rays have energy of the order of...

10 eV
10⁶ eV
infinity
zero

In Rutherford model of the atom, the path of an electron will be...

a straight line
parabolic
circular
spiral

A double concave lens of glass, placed in a liquid of refractive index 2, will behave as...

diverging lens
concave mirror
converging lens
none of the above

Megawattday is the unit of...

power
force
energy
density

A particle executes SHM with its frequency f. The frequency with which its kinetic energy oscillates is...

f/2
f
2f
4f

If the acceleration due to gravity,g, is about 10 m/s² near the surface of the earth, then at the centre of the earth g would have an approximate value of...

zero
5 m/s²
10 m/s²
20 m/s²

A tuning fork vibrates at a frequency of f Hz. It is viewed through a stroboscopic disc having four equally spaced slots in it. In order for the vibrating tuning fork to appear stationary, the minimum number of revolutions per second at which the disc should be rotated is...

f/8
f/4
f/2
f

Which of the following materials has the greatest relative permittivity?

Air
Glass
Mica
Water

The distance between two consecutive antinodes is...

λ
λ/2
λ/3
λ/4

For an object below the earth's surface, if the distance of the object from earth's centre is 'd', then the acceleration due to gravity is proportional to...

d
d²
1/d
1/d²

A type of process that does not need outside energy to reverse is one that occurs at constant...

temperature
pressure
volume
speed

Which of the following combinations of length(l) and cross-sectional area(A) will give a certain volume of copper the least resistance?

l and A
2l and A/2
l/2 and 2A
none

Inside a solenoid, the magnetic field...

is zero
is uniform
increases with distance from the axis
decreases with distance from the axis

When the voltage are in phase in an a.c. circuit...

impedance is zero
reactance is zero
resistance is zero
phase angle is 90°

The distance between two consecutive bright fringes increases as...

the wavelength increases
the frequency increases
the wavelength decreases
the separation of two sources increases

Photoelectric effect can be explained on the basis of...

the wave theory of light
the theory of relativity
the theory of black-body radiation
none of the above

Acoustics is the branch of physics studying...

light
heat
sound
motion of planets

The prefix 'pico' represents...

10^-9
10^-12
10⁹
10¹²

The unit vector in the same direction as(-3i + 4j) is...

(-3/5)i + (4/5)j
-i + j
3i - 4j
(-1/3)i + (1/4)j

An 800-kg car moving at 80 kmph overtakes a 1200-kg car moving at 40 kmph in the same direction. If the two cars stick together,the wreckage has an initial speed of...

8 kmph
40 kmph
56 kmph
60 kmph

For a fixed mass of gas in an isothermal process, the plot of V→(1/p) is...

a straight line
a parabola
a nonparabolic curve
a hyperbolic curve

When a vapour condenses into liquid...

it absorbs heat
it volves heat
its temperature rises
its temperature falls

For a rectangular glass slab, the entering ray and the emerging ray...

are parallel
form a right angle
form an acute angle
form an obtuse angle

MCQs In Higher Secondary Physics

Monday, June 23, 2014

MCQs : SET # 15

NOTE : Each set contains 30 questions. Time limit is 45 minutes.

Tuesday, April 1, 2014

MCQ : Set #14

NOTE : Each set contains 30 questions. Time limit is 45 minutes.

Saturday, March 29, 2014

MCQ : Set #13

NOTE : Each set contains 30 questions. Time limit is 45 minutes.

Saturday, March 15, 2014

MCQ : Set #12

MCQ : set #11

MCQ : Set #10

MCQ : Set #9