A unit magnetic pole is that pole which repels an identical pole at a 1 meter distance with a force of ________.

10^{- 6} N

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10^{- 7} N

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10^{- 5} N

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10^{- 4} N

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Solution

The correct option is B $10^{- 7} N$
We know that from, Coulomb's law of magnetism.
F = $\frac{μ_{0}}{4 π} \frac{m_{1} m_{2}}{r_{2}}$
$m_{1} = 1 A - M, m_{2} = 1 A - m$
r = 1m
F = $\frac{10^{- 7} \times 4 π}{4 π} \frac{1 \times 1}{1}$
F = $10^{- 7} N .$
F = force between the poles
$μ$ = permeability constant
$m_{1} a n d m_{2}$ = pole strengths of magnetic poles
r = distance of separation between poles.

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A unit magnetic pole is that pole which repels an identical pole at a 1 meter distance with a force of ________.

The correct option is B 10−7NWe know that from, Coulomb's law of magnetism.F = μ04πm1m2r2m1=1A−M,m2=1A−mr = 1mF = 10−7×4π4π1×11F = 10−7N.F = force between the poles μ = permeability constantm1andm2 = pole strengths of magnetic poles r = distance of separation between poles.