A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate . Loop 1 of radius R r enclosed the region of magnetic field having radius r and an

Question

A uniform magnetic field is restricted within a region of radius r. The magnetic field changes with time at a rate . Loop 1 of radius R > r enclosed the region of magnetic field having radius r and another loop 2 of radius R is outside the region of magnetic field as shown in the figure below. Then

Accepted Answer

Answer: − πr² in loop 1 and zero in loop 2 — For loop 1: ε = −dφ/dt = −dB/dt × πr² For loop 2, the induction can happen due to the induced current in loop 1, which will be much smaller than the induced emf in loop 1. Hence the most suitable opti

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