Sound Class 8 MCQ Questions and Answers

The value of frequency of vibration of a tuning fork 1. does not change even if it is striked harder 2. does not change even if it is striked gently 3. changes when its dimensions are changed 4. All of the above

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The value of the frequency of oscillation of a simple pendulum 1. changes with the increase in the amplitude of oscillation 2. does not change even if its amplitude is slightly increased 3. does not change even if its amplitude is slightly decreased 4. (2) and (3)

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The frequency of vibration of a given tuning fork 1. does not change even if it is striked hardly on gently 2. increases when it is striked hardly 3. decreases when it is striked hardly 4. decreases when it is striked gently

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The value of the frequency of oscillation of a simple pendulum depends upon 1. its length 2. amplitude 3. the size of its bob 4. the shape of its bob

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If one of the two bodies vibrates with larger amplitude under the influence of the first body, then their frequencies are 1. equal 2. not equal 3. equal after some time 4. none of these

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If a body under the influence of an external periodic force vibrates with its natural frequency, then 1. the natural frequency of the body is equal to the natural frequency of the external periodic force 2. the natural frequency of the body is not equal to the frequency of the external periodic force 3. both of these 4. None of these

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The frequency of vibrations produced in a body under the influence of an external body is 1. equal to the natural frequency of the body 2. equal to twice the frequency of the external periodic force 3. equal to the frequency of the external periodic force 4. None of above

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The vibrations produced in a body under the influence (action) of an external periodic force are called 1. Natural vibrations 2. Forced vibrations 3. Free vibrations 4. Resonance

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The frequency of vibration attained by a table top when the stem of a vibrating tuning fork is pressed against it is equal to the 1. Natural frequency of the table top 2. Natural frequency of the tuning fork 3. Sum of the natural frequencies of table top and tuning fork 4. None

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The vibrations produced in a table top when the stem of a vibrating tuning fork is pressed against the table top, are 1. Natural vibrations 2. Forced vibrations 3. Free vibrations 4. None of these

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