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If the time period of a pendulum is 1sec...

If the time period of a pendulum is `1sec`, then what is the length of the pendulum at point of intersection of `l-T` and `l-T^(2)` graph.

A

`25cm`

B

`21cm`

C

`22cm`

D

`27cm`

Text Solution

Verified by Experts

The correct Answer is:
A
`T=2pisqrt((l)/(g))`, `T^(2)=4pi^(2)(l)/(g)`
`l(g)/(4pi^(2))=(9.8)/(4xx9.8)=0.25=25cm` (`:' pi^(2)=9.8`)
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