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A closely wound solenoid of 100 turns and area of cross-section 1.5 \times 10^{-4} \mathrm{m}^{ 2} , carrying a current of 2 \mathrm{~A} , is suspended through its centre allowing it to turn in a horizontal plane . what is the magnetic moment associated with the solenoid?

Option: 1

0.3 \mathrm{Am}^2


Option: 2

0.5 \mathrm{Am}^2


Option: 3

0.75 \mathrm{Am}^2


Option: 4

1.5 \mathrm{Am}^2


Answers (1)

best_answer

The magnetic moment of the solenoid is
{ \mathrm{M=I N A=2 \times 1000 \times 1.5 \times 10^{-4}=0.3 \mathrm{Am}^2 }}
Hence the correct choice is (a).

Posted by

manish

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