As the temperature is increased, the period of a pendulum

Options

A. increases as its effective length increases even though its centre of mass still remains at the centre of the bob
B. decreases as its effective length increases even though its centre of mass still remains at the centre of the bob
C. increases as its effective increases due to shifting to centre of mass below the centre of the bob
D. decreases as its effective length remains same but the centre of mass shifts above the centre of the bob

Answer

A

Explanation

As the temperature is increased length of the pendulum increases. We know that time period of pendulum `T = 2pi sqrt((L)/(g))`
`rArr T prop sqrt(L)` , as L, increases.