Moving Charges and Magnetism

Question: A wire in the form of a square of side ‘a’ carries a current i. Then the magnetic induction at the centre of the square wire is (Magnetic permeability of free space = ${\mu _o}$)

1) $\frac{{{\mu _0}i}}{{2\pi a}}$

2) $\frac{{{\mu _0}i\sqrt 2 }}{{\pi a}}$

3) $\frac{{2\sqrt 2 {\mu _o}i}}{{\pi a}}$

4) $\frac{{{\mu _0}i}}{{\sqrt 2 \pi \,a}}$

Solution:

Explanation: No Explanation

Biot-Savart's Law Amperes Law

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