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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
  1. i NA
  2. i N2A
  3. i2 NA
  4. iN/A

A
i N2A
B
iN/A
C
i NA
D
i2 NA
Solution
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Magnetic dipole moment of small coil of N turns having an area A and a current i is
M=NiA

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