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Question

A coil of 100 turns and resistance 100Ω is connected in series with a galvanometer of resistance 100Ω and the coil is placed in a magnetic field. If the magnetic flux linked with the coil changes from 103Wb to 2×104Wb in a time of 0.1s, calculate the induced emf and current.

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Solution

dϕdt=103(2×104)01=19000Emf,ϵ=NE=100×8×104101=800×103=8×101v
Current, i=ϵRcoil+Rg=8×101100+100=82×103=4×103A

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