Magnetism Question 120
Question: The time period of a vibration magnetometer is T0. Its magnet is replaced by another magnet whose moment of inertia is 3 times and magnetic moment is 1/3 of the initial magnet. The time period now will be
[MP PMT 2000]
Options:
A) 3T0
B) T0
C) $ T _{0}/\sqrt{3} $
D) T0/3
Show Answer
Answer:
Correct Answer: A
Solution:
$ T=2\pi \sqrt{\frac{I}{MB _{H}}};\ I\to 3 $ times and $ M\to \frac{1}{3} $ times So $ T\to 3 $ times i.e. $ {T}’=3T _{0} $
BETA
