Published by:
CGP EDU Academic Team
Published on: August 21, 2026
In a uniform magnetic field of 
, a magnetic needle performs 20 complete oscillations in 5 seconds as shown. The moment of inertia of the needle is 
. If the magnitude of magnetic moment of the needle is 
, then the value of ' 
' is;
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B 
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