Q.

The strength of the magnetic field in which the magnet of a vibration magnetometer is oscillating is increased 4 times its original value. The frequency of oscillation would then become

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a

Twice its original value

b

Four times its original value

c

Half its original value

d

One-fourth its original value

answer is A.

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Detailed Solution

Frequency, v∝B As B is increased by 4 times the frequency of oscillation v increases by 2 times
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The strength of the magnetic field in which the magnet of a vibration magnetometer is oscillating is increased 4 times its original value. The frequency of oscillation would then become