Question

A circular loop of radius 15 cm is located in the plane of the paper inside a homogeneous magnetic field of 0.1 T pointing into the paper. It is connected in series with a resistor of 195 2. The magnetic field is now increased at a constant rate by a factor of 2.4 in 21.0 s. Calculate the magnitude of the induced emf in the loop in V during that time. Submit Answer Tries 0/10 Calculate the current induced in the loop in A during that time. Submit Answer Tries 0/10 Calculate the average induced voltage, in V, when the magnetic field is constant at 0.24 T while the loop is pulled horizontally out of the magnetic field region in 8.5 s at constant speed.

Answer 1

a)

V = A dB/dt = 3.14* 0.15^2* (2.4 / 21)

V = 8.07* 10^-3 V

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b)

i = V/ R = 4.14* 10^-5 A

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c)

V = B ( pi * 0.15^2 - 0) / 8.5

V = 1.99* 10^-3 V

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