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The northk and south poles of a bar magn...

The northk and south poles of a bar magnet are situated 0.4 cm inside from the geometric ends of the magnet. If the geometric length of the magnet is 6 cm, then its effective length is ________ mm.

A

48

B

52

C

56

D

54

Text Solution

Verified by Experts

The correct Answer is:
B
Geometric length of the magnet = 6 cm.
Therefore, effective length of the magnet = 6 - (2 x (0.4) = 5.2 cm = 52 mm.
Hence, the correct option is (b).
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