MCQ
The magnetic moment has dimensions of
  • A
    $\left[ {LA} \right]$
  • $\left[ {{L^2}A} \right]$
  • C
    $\left[ {L{T^{ - 1}}A} \right]$
  • D
    $\left[ {{L^2}{T^{ - 1}}A} \right]$

Answer

Correct option: B.
$\left[ {{L^2}A} \right]$
b
Magnetic moment of a coil carrying current is, $M = I.A$ [$A$ is area of cross section and $i$ is current] Dimension of $M = AL^2$

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