Question

# What will be the percentage change in the time period of a simple pendulum if its length is increased by 5%?

A
1/9%
B
2.5%
C
5.2%
D
9%

Solution

## The correct option is B 2.5%$$T\propto \sqrt L$$Thus if $$L'=1.05L$$,$$T'=T(\sqrt {1.05})=T(1.025)$$or, change = $$2.5$$%Physics

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