Mathematics · Magnetic Effects of Electric Current
Two identical circular loops P and Q, each of radius r, lie in parallel planes with a common axis. The currents through P and Q are I and 4I respectively, in a clockwise direction as seen from the midpoint O on the axis. The net magnetic field at O is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13μ0 I4√2 r towards Q✓
- 2μ0 I4√2 r towards Q
- 3μ0 I4√2 r toward P
- 43μ0 I4√2 r toward P
Correct answer
3μ0 I4√2 r towards Q
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