Moving Charges and Magnetism

Question: A uniform wire is bent in the form of a circle of radius $R$. A current $I$ enters at $A$ and leaves at $C$ as shown in the figure. If the length ABC is half of the length ADC, the magnetic field at the centre $O$ will be

Question Image

1) Zero

2) $\frac{{{\mu _0}I}}{{2R}}$

3) $\frac{{{\mu _0}I}}{{4R}}$

4) $\frac{{{\mu _0}I}}{{6R}}$

Solution:

Explanation: No Explanation

Biot-Savart's Law Amperes Law

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