Question

Wire Ring . A uniform magnetic field is confined to a cylindrical volume of radius 8 cm. The field is directed out of the plane of the screen and is increasing at a constant rate of AB At = 0.22 T/s. Calculate the magnitude and direction of the current induced in a circular wire ring of radius 16 cm and resistance 3.7 12 that encircles the magnetic field region Magnetic Field Region

Answer 1

Rate of change of field, dB/dt = 0.22 T/s

Emf, E = - A dB/dt

Current, I = (A/R) dB/dt

I = (pi x 0.08^2/3.7) x 0.22

Current, I = 1.20 x 10^-3 A

Direction : Counterclockwise

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