A 25 cm long solenoid has the radius 2 cm and 500 turns. It carries a current of 15 A . If it is equivalent to a magnet of the same size and magnetization M → M a g n e t i c m o m e n t v o l u m e , then M → is:

Question

A 25 cm long solenoid has the radius 2 cm and 500 turns. It carries a current of 15 A . If it is equivalent to a magnet of the same size and magnetization M → M a g n e t i c m o m e n t v o l u m e , then M → is:, 3 π A m - 1, 30000 A m - 1, 30000 π A m - 1, 300 A m - 1

MARKS App · Accepted Answer

V o l u m e = A l M a g n e t i z a t i o n M → = m a g n e t i c m o n e n t V o l u m e = N o . o f t u r n s × C u r r e n t × A r e a V o l u m e = N I A A l = N I l = 500 × 15 × 100 25 = 60 × 500 = 30 × 10 3 = 30000 A m - 1

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