Maximum value of induced EMF – Rankers Physics
Topic: Electromagnetic Induction
Subtopic: Faraday's Law of Electromagnetic Induction

Maximum value of induced EMF

Two coils have mutual inductance \(0.005\text{ H}\). The current changes in the first coil according to equation \(I = I_0 \sin \omega t\), where \(I_0 = 10\text{ A}\) and \(\omega = 100\pi\text{ rad/s}\). The maximum value of EMF in the second coil is:
\(2\pi\)
\(5\pi\)
\(\pi\)
\(4\pi\)

Solution:

Induced EMF is \(e = M \frac{dI}{dt} = M I_0 \omega \cos \omega t\). Maximum EMF \(e_{max} = M I_0 \omega = 0.005 \times 10 \times 100\pi = 5\pi\text{ V}\).

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