Two identical circular loops P and Q each of radius are lying in parallel planes such that they have common axis. The current through P and Q are and respectively in clockwise direction as seen from O. The net magnetic field at O is:

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Solution

Q.

Two identical circular loops P and Q each of radius $r$ are lying in parallel planes such that they have common axis. The current through P and Q are $I$ and $4 I$ respectively in clockwise direction as seen from O. The net magnetic field at O is: [2026]

1 $\frac{μ_{0} I}{4 \sqrt{2} r}$ towards Q

2 $\frac{3 μ_{0} I}{4 \sqrt{2} r}$ towards Q

3 $\frac{3 μ_{0} I}{4 \sqrt{2} r}$ towards P

4 $\frac{μ_{0} I}{4 \sqrt{2} r}$ towards P

Ans.
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