The length of a magnet is large compared to its width and breadth. The time period of its oscillation in a vibration magnetometer is 
. The magnet is cut along its length into three equal parts and three parts are then placed on each other with their like poles together. The time period of this combination will be
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Initially, the time period of the magnet
..... (i)
For each part, it’s moment of inertia 
and magnetic moment 
Moment of inertia of system 
Magnetic moment of system 
Time period of system
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