A-level Physics · Electromagnetic induction
Faraday's law: induced emf
Use ε = NΔΦ/Δt with the area in cm² and the time in ms, or from a change of flux linkage.
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Question 1
A coil of 250 turns and area 80 cm² has its plane perpendicular to a uniform magnetic field. The magnetic flux density changes steadily from 0.75 T to 0.16 T in 500 ms. Calculate the average emf induced in the coil. Give your answer to 3 significant figures.
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