Induced EMF in a Coil Around a Solenoid

Question

The current in a 200-turn solenoid with a cross-sectional area of $$4.0 	imes 10^{-4} \, 	ext{m}^2$$ is described by the function $$I = I_0 e^{-t/	au}$$, where $$	au = 0.05 \, 	ext{s}$$. At time $$t=0$$, the magnetic field inside the solenoid is $$0.30 \, 	ext{T}$$. A single-turn coil surrounds the solenoid. What is the magnitude of the induced electromotive force (emf) in the coil at $$t = 0.05 \, 	ext{s}$$?

Accepted Answer

8.8×10⁻⁴ V

Answer

0 V

Answer

2.4×10⁻⁵ V

Answer

1.2×10⁻⁴ V

Induced EMF in a Coil Around a Solenoid

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