Cupcakelover3134 Cupcakelover3134

26-03-2024
Physics

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Surface charge density on a ring of radius a and width d is σ as shown in the figure It rotates with frequency f about its own axis.Assume that the charge is only on outer surface the magnetic field induction at centre is (Assume that d<A. 2πμ0f σd
B. π² /2μ0f σd
C. πμ0f σd
D. μ0f σd

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