Moving Charges and Magnetism

Question: A charge $q$ coulomb moves in a circle at $n$ revolutions per second and the radius of the circle is $r$ metre. Then magnetic field at the centre of the circle is

1) $\frac{{2\pi q}}{{nr}} \times {10^{ - 7}}$ N/amp/metre

2) $\frac{{2\pi q}}{r} \times {10^{ - 7}}$ N/amp/metre

3) $\frac{{2\pi nq}}{r} \times {10^{ - 7}}$ N/amp/metre

4) $\frac{{2\pi q}}{r}$ N/amp/metre

Solution:

Explanation: No Explanation

Biot-Savart's Law Amperes Law

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