Physics · Magnetic Effects of Current
A current I is flowing through a circular loop consisting of two concentric semi-circular arcs of radii MA = R and MB = 2R joined by straight lines (such that ∠DMA = 90°). The magnetic field at the center of the loop M is μ0I/R times:
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- 1516, into the plane of the paper
- 2516, out of the plane of the paper
- 3716, out of the plane of the paper
- 4716, into the plane of the paper✓
Correct answer
716, into the plane of the paper
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