PH-315
Electromagnetic induction
Physics · Secondary 3 · Hard · Electromagnetic induction
Two coils, A and B, are placed in the same region of changing magnetic field so they experience the same rate of change of magnetic flux per turn. Coil A has 100 turns and coil B has 200 turns. Each coil is connected to an identical resistor. According to Faraday’s law, what happens to the induced e.m.f. and current in B compared with A?
- B has the same e.m.f. and the same current as A
- B has twice the e.m.f. and twice the current of A
- B has twice the e.m.f. but half the current of A
- B has half the e.m.f. but twice the current of A
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