A circular loop of wire of radius 12.3 cm is placed in a magnetic field directed

Question

A circular loop of wire of radius 12.3 cm is placed in a magnetic field directed perpendicular to the plane of the loop, as shown in the figure below. If the field decreases at the rate of 0.470 T/s in some time interval, what is the magnitude of the emf induced in the loop during this interval?

My Notes o Ask Your Teacher points SerCP920-P012 A circular loop of wire of radius 12.3 cm is placed in a magnetic field directed perpendicular to the plane of the loop, as shown in the figure below. lf the field decreases at the rate of 0.470 T/s In some time interval, what is the magnitude of the emf induced In the loop during this interval? Need Help? Submit Answer Save Progress Practice Another Version

Explanation / Answer

-dB/dt = 0.47 T/s

r = 12.3 cm

from faradays law

induced emf = change in magnetic fluz

V = -AdB/dt

V = 3.14*0.123^2*0.47

V = 0.022 V

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