A uniform magnetic field exists only inside a circular region of radius 0.20 m and changes at 5 T/s. Determine the induced electric-field magnitude, in V/m, at radius 0.50 m.
Physics · Electromagnetic Induction · electric field due to changing magnetic field
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Question

A uniform magnetic field exists only inside a circular region of radius 0.20 m and changes at 5 T/s. Determine the induced electric-field magnitude, in V/m, at radius 0.50 m.

G1 Physics · Accepted Answer

For r>R, E = R²|dB/dt|/(2r)=0.04×5/(1.0)=0.20 V/m.