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Young's Modulus of Elasticity

The elastic p...

Question

The elastic potential energy of a spring-

A

Increases only when it is stretched.

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B

Decreases only when it is stretched.

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C

Decreases only when it is compressed.

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D

Increases whether stretched or compressed.

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Solution

The correct option is C Increases whether stretched or compressed.
External force is required to both stretch or compress a spring.
Hence, The work done will be stored as elastic potential energy when stretched or compressed.

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Q. Assertion :A spring has potential energy, both when it is compressed or stretched. Reason: In compressing or stretching, work is done on the spring against the restoring force.

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