question_answer

A simple pendulum made of a bob of mass m and a metallic wire of negligible mass has time period 2s at T = 0°C. If the temperature of the wire is increased and the corresponding charge in its time period is plotted against its temperature, the resulting graph is a line of slop S. If the coefficient of linear expansion of metal is a then the value of S is:          [JEE ONLINE 09-04-2016]

A) \[\frac{1}{\alpha }\]

B)                              \[2\alpha \]

C) \[\frac{\alpha }{2}\]                  

D)      \[\alpha \]

Correct Answer: B

Solution :

[d]