Find the average induced emf and the average current through the coil
A coil of resistance 150 ohms is placed in a magnetic field of 0.1 mWb. The coil has 500 turns and a galvanometer of 450 ohms connected in series with it. The coil is moved in 0.1 s from the given field to another field of 0.3 mWb. Find the average induced emf and the average current through the coil?
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flux through the coil Ф1 = 500 turns * 0.1 * 10^-3 Wb
t = 0.1 sec
Ф2 = 500 turns * 0.3 * 10^-3 Wb
average induced emf = - dФ/dt = - 500 * 0.2 * 10^-3 / 0.1 = - 1 Volt
average current = - 1 /(150+450) = -1.67 mA
t = 0.1 sec
Ф2 = 500 turns * 0.3 * 10^-3 Wb
average induced emf = - dФ/dt = - 500 * 0.2 * 10^-3 / 0.1 = - 1 Volt
average current = - 1 /(150+450) = -1.67 mA
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