First slide

The bar magnet

Question

Dimensional formula for pole strength of a magnet is

Easy

A

$M^{- 1} {LT}^{0} I$
B

${IL}^{2}$
C

IL
D

${IL}^{- 2}$

Solution

$(pole strength) \times (pole separation) = (Magnetic dipole moment) ∴ unit of pole strength = \frac{A - m^{2}}{m} = Am ∴ [Pole strength] = IL$

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