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Two magnets are held together in a vibra...

Two magnets are held together in a vibration magnetometer and are allowed to oscillate in the earth's magnetic field with like poles togather, 12 oscillations per minute are made but for unlike poles togather only 4 oscillations per minute are axecuted. The ratio of their magnetic miments is

A

`3:1`

B

`1:3`

C

`3:5`

D

`5:4`

Text Solution

Verified by Experts

The correct Answer is:
D
`(V_(1))/(V_(2))=(12)/(4)=(3)/(1)`
`(T_(1))/(T_(2))=(1)/(3)`
`"Further" T alpha(1)/(sqrtM)`
`therefore " " sqrt((M_(1)-M_(2))/(M_(1)+M_(2)))=(1)/(3)`
`"This equation gives", (M_(1))/(M_(2))=(5)/(4)`
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