A thin plastic ring of radius R carries a charge q uniformly spread over the entire ring. The ring is rotating with angular velocity ω about its axis. The magnetic induction at the centre of the ring is

Question

A thin plastic ring of radius R carries a charge q uniformly spread over the entire ring. The ring is rotating with angular velocity ω about its axis. The magnetic induction at the centre of the ring is, μ 0 q ω 2 π R, μ 0 q ω π R, μ 0 q ω 4 π R, zero

MARKS App · Accepted Answer

Due to charge q moving on circular path B c e n t r e = µ 0 I 2 R = µ 0 q f 2 R = µ 0 q ω 4 π R

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