Saturday, March 15, 2014

MCQ : Set #10

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


  1. 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. 1.0 m
    2. 1.2 m
    3. 1.4 m
    4. 1.6 m

  2. 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...

    1. up and down
    2. back and forth
    3. a combination of A & B
    4. impossible to determine

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

    1. real and erect
    2. real and inverted
    3. virtual and erect
    4. virtual and inverted

  4. 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...

    1. 0
    2. between 0 and 50%
    3. 50%
    4. between 50 and 100%

  5. The electron-volt is a measure of...

    1. charge
    2. current
    3. potential
    4. energy

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

    1. joule
    2. joule-hertz
    3. joule-second
    4. newton-second

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

    1. increasing the separation of the plates
    2. increasing the area of overlap of the plates
    3. replacing the air between the plates by paper
    4. replacing the air between the plates by mica

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

    1. phase reversal
    2. Huygen's principle
    3. coherence
    4. destructive interference

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

    1. m1 : m2
    2. m2 : m1
    3. m12 : m22
    4. √m1 : √m2

  10. 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.

    1. 2Y
    2. 3Y
    3. Y
    4. Y/2

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

    1. law of conservation of momentum
    2. law of conservation of energy
    3. Boyle's law
    4. Charles' law

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

    1. 330°C
    2. 485°C
    3. 674°C
    4. 1000°C

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

    1. 75°
    2. 0°
    3. 45°
    4. 60°

  14. 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...

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

  15. Ball-point pen functions on the principle of

    1. viscosity
    2. Boyle's law
    3. gravitational force
    4. surface tension

  16. 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. 1
    2. 2
    3. 0.5 x 10-2
    4. 1.0 x 10-2

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

    1. violet
    2. red
    3. blue
    4. green

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

    1. each of them increases
    2. each of them decreases
    3. copper increases and germanium decreases
    4. copper decreases and germanium increases

  19. Which of the following is always attractive?

    1. Strong force
    2. Electrostatic force
    3. Magnetic force
    4. None of the three

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

    1. thermal energy
    2. kinetic energy
    3. light energy
    4. potential energy

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

    1. EA = EM
    2. EA = EM/(√ 2)
    3. EA > EM
    4. EA < EM

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

    1. 1.7 MPa
    2. 1.997 MPa
    3. 2.003 MPa
    4. 1.3 GPa

  23. A wetting agent...

    1. reduces angle of contact
    2. increases angle of contact
    3. increases surface tension
    4. increases surface area

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

    1. becomes zero
    2. decreases considerably
    3. increases considerably
    4. does not change

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

    1. amplitude
    2. length
    3. mass of pendulum
    4. 'g'

  26. The amplitude of a sound wave determines its...

    1. pitch
    2. loudness
    3. overtones
    4. resonance

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

    1. greater than that at the equator
    2. smaller than that at the equator
    3. equal to that at the equator
    4. zero

  28. Which of the following engines is the most efficient?

    1. gasoline
    2. diesel
    3. gas turbine
    4. Carnot

  29. 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...

    1. 0
    2. 0.5 ohm
    3. 1.1 ohm
    4. 5 ohm

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

    1. 1/√LC
    2. √(L/C)
    3. (1/R).√(L/C)
    4. R/(√LC)
Posted by at

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)