(Set 1) Simple Harmonic Motion

Q1. 
Time period of a pendulum will ........... at the moon to that of on the earth.
  1. remain same
  2. decreases
  3. increases
  4. No option is correct

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Correct Answer : C

Q2. 
A slow running pendulum clock can be speeded up by
  1. increasing the length of the bod
  2. increasing the weight of the bod
  3. reducing the length of the bob
  4. reducing the weight of the bod

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Correct Answer : D

Q3. 
If a clock based on oscillating pendulum is taken from the earth to moon, it will
  1. become slow
  2. become fast
  3. give same time as on the earth
  4. stop working

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Correct Answer : C

Q4. 
A girl is swinging on a swing in a sitting position. How will the period of swing be affected if the girl stood up?
  1. The period will decrease
  2. The period will increase
  3. The period will remain the same
  4. The swing will stop

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Correct Answer : B

Q5. 
Which one of the following is an example of the force of gravity of the earth acting on a vibrating pendulum bob?
  1. Applied force
  2. Frictional force
  3. Restoring force
  4. Virtual force

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Correct Answer : C

Q6. 
If T is the time period of an oscillating pendulum, then which one of the following statement is not correct?
  1. The motion repeats after time T only once.
  2. T is the least time after which motion repeats itself.
  3. The motion repeats itself after nT, where n is a positive integer.
  4. T remains the same only for small angular displacements.

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Correct Answer : A

Q7. 
A man is standing at a spring platform. Reading of spring balance is 60 kg-wt. If man jumps outside platform, then reading of spring balance
  1. first increase, then decrease to zero
  2. decreases
  3. increases
  4. remains same

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Correct Answer : A

Q8. 
A pendulum is suspended from the ceiling of the compartment of a train. When the train is stationary, the time period of the pendulum is T. If the train accelerates, how will the time period of the pendulum change?
  1. It will increase
  2. It will decrease
  3. It will remain unchanged
  4. Pendulum will not oscillate

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Correct Answer : B

Q9. 
A particle is executing simple harmonic motion. Which one of the following statements about the acceleration of the oscillating particle is true?
  1. It always in the opposite direction to velocity.
  2. It is proportional to the frequency of oscillation.
  3. It is minimum when the speed is maximum.
  4. It decreases as the potential energy increases.

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Correct Answer : C

Q10. 
The time period of a simple pendulum made by using a thin copper wire of length L is T. Suppose the temperature of the room in which this simple pendulum is placed increases by 30 degree C. What will be the effect on the time period of the pendulum?
  1. T will increases slightly
  2. T will remain the same
  3. T will decreases slightly
  4. T will become more than 2 times

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Correct Answer : A

Q11. 
Consider the following statements. 1. On increasing the length of the pendulum, the time period of pendulum will increase. 2. The time period of a simple pendulum doesn't depend upon its mass. Which of the statement(s) given above is/are correct?
  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2

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Correct Answer : C

Q12. 
Consider the following statements. 1. In summer season, the effected length of the pendulum clock is lengthened (increased length), so its time period is also increased and consequently the clock becomes slow. 2. In winter season, the effective length is contracted, thus time period is decreased and the clock becomes fast. Which of the statement(s) given above is/are correct?
  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2

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Correct Answer : C

Q13. 
A spring can be used to determine the mass m of an object in two ways : 1. by measuring the extension in the spring due to the object and 2. by measuring the oscillation period for the given mass. Which of these methods can be used in a space-station orbiting the earth?
  1. Only 1
  2. Only 2
  3. Both 1 and 2
  4. Neither 1 nor 2

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Correct Answer : B

Q14. 
If the amplitude or oscillation of a simple pendulum is very small, then its time period of oscillation 1. depends on the length of the pendulum, L. 2. depends on the acceleration due to gravity, g. 3. depends upon the mass of the bob of the pendulum, m. 4. does not depend upon the amplitude of the pendulum, A. Select the correct answer using the codes given below
  1. 1, 2 and 3
  2. 1, 2 and 4
  3. 2, 3 and 4
  4. 1 and 4

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Correct Answer : C

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