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Two small magnets are placed horizontall...

Two small magnets are placed horizontally perpendicular to magnetic meridian. Their north poles are at `30cm` east and `20cm` west from a compass needle. Compare the magnetic moments of the magnets, if compass needle remains undeflected.

A

4:5

B

16:25

C

64:125

D

`2:sqrt(5)`

Text Solution

Verified by Experts

The correct Answer is:
C
For null deflection `M_(1)/M_(2)=(d_(1)/d_(2))^(3)=(40/50)^(3)=64/125`
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A2Z-MAGNETISM AND MATTER-Section D - Chapter End Test
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