AIIMS 2009 Physics Spring Constant MCQ Question with Solution

Which of the following graph depicts spring constant $k$ versus length $l$ of the spring correctly?

A

B

C

D

Option D

Since k ∝ 1/l.

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The potential energy of a long spring when stretched by 2 cm is U. If the spring is stretched by 8 cm the potential energy stored in it is:

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