A coil of 160 turns and area 0.20 m² is placed with its axis parallel to a magnetic field of 0.40 T. The magnetic field changes from 0.40 T in the x-direction to 0.40 T in the negative x-direction in 2.0 s. If the resistance of the coil is 16 Ω, at what rate is power generated in the coil?

Question

Quizplus · Accepted Answer

The change in magnetic flux is 0.40 T * 0.20 m² * 160 turns * 2 (since it reverses direction) = 25.6 Wb. The induced EMF is 25.6 Wb / 2 s = 12.8 V. The power generated is (12.8 V)² / 16 Ω = 10 W.

A Coil of 160 Turns and Area 0