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QAIPMT-2003-Ph-2715: NEET 2003 Physics - Class 12 AIPMT-2003-Ph-2715 Solution: A bar magnet is oscillating in the Earth's magnetic field with…
A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to its period and motion if its mass is quadrupled?
Multiple Choice Options
- A motion remains simple harmonic with time period = T/2
- B motion remains S.H.M with time period = 2T
- C motion remains S.H.M with time period = 4T
- D motion remains S.H.M and period remains nearly constant
Step-by-Step Verified Solution
The time period of a bar magnet in a magnetic field is given by
T = 2 � I M B = 2 � m k 2 M B _ m
_ T 1 T 2 = m 1 m 2 = T 1 T 2 = m 1 m 2 = m 4 m = 1 2
_ T 2 = 2T 1 = 2T.