A magnetic needle suspended by a silk thread is vibrating in the earth's magnetic field. If the temperature of the needle is increased by `500^(@)C`, then

Options

A. The time period decreases
B. The time period remains unchanged
C. The time period increases
D. The needle stops vibrating

Answer

C

Explanation

`T prop 1/sqrt(M)`. Since magnatic moment decreases with increase in temperature hence time period T increases.