Two north poles each of pole strength m and a south pole of pole strength m are placed at the thr...

Описание: Two north poles each of pole strength m and a south pole of pole strength m are placed at the three corners of an equilateral triangle of side a. The intensity of magnetic induction field strength at the centre of the triangle is
a. μ_0/4 πm/a^2
b. μ_0/4 π6 m/a^2
c. μ_0/4 π9  m/a^2
d. μ_0/4 πm/2 a^2

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