Choose the correct options from the following, If two objects are in resonance with each other:

Both of them have the same frequency.

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Both of them have different natural frequency.

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The vibrations of the bodies are in phase.

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The vibration of the body are out of phase.

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Solution

The correct options are
A
Both of them have the same frequency.

C
The vibrations of the bodies are in phase.

The vibrations of a body, under an external periodic force of frequency exactly equal to the natural frequency of the body, are called the resonant vibrations.

Hence two objects in resonance with each other have the same frequency and the vibrations of the bodies are in phase.

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