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Two short magnets with pole strengths of...

Two short magnets with pole strengths of 100 ab ampere-cm and 64 ab ampere-cm are placed with their axes in the sarme vertical line, with similar poles facing each other, Each magnet has a length of 1 cm. When separation between the nearer poles is 1 cm, the weight of upper magnet is supported by the repulsive force between the magnets. If `g= 1000" cm/s"^(2)`, then the mass of upper magnet is

A

10g

B

5.5g

C

3.9g

D

7.5g

Text Solution

Verified by Experts

The correct Answer is:
C
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