Question

The length of a second's pendulum at the equator is $L.$ The length of second's pendulum at the North pole will be

• A. $<L$
• B. $>L$
• C. $L$
• D. $L/2$

Answer 1

The correct option is B $>L$

$\begin{array}{c}2=2\pi \sqrt{\frac{L}{g-w^{2}R}}Atequator\\ 2=2\pi \sqrt{\frac{L^{\prime }}{g}}Atnorthpole\\ \therefore L^{\prime }>L\end{array}$

Ans. (B)