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Magnetic Field Due to Current in a Solenoid

A small coil ...

Question

A small coil of N turns has an area A and a current i flows through it. The magnetic dipole moment of the coil will be

A

i NA

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B

i^{2}

NA

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C

i

N^{2}

A

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D

iN/A

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Solution

The correct option is A i NA
Magnetic dipole moment of small coil of N turns having an area A and a current $i$ is
$M = N i A$

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