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JEE Main Physics Class 12 Moving Charges and Magnetism Part 1 Questions

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Question : 6

Total: 100

A thin ring of 10cm radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 40 À rad s−1 about its axis, perpendicular to its plane. If the magnetic field at its centre is 3.8×10−9T, then the charge carried by the ring is close to (µ0=4π×10−7N∕A2).

[12 April 2019, I]

2×10−6C
3×10−5C
4×10−5C
7×10−6C

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