A circular coil with an area of 5.0 ´ 10 2 cm 2 and with 500 turns of wire is pl

Question

A circular coil with an area of 5.0 ´ 102cm2 and with 500 turns of wire is placed in a uniformmagnetic field perpendicular to the plane of the coil. If the fieldchanges in value from –0.100 T to +0.150 T in an interval of0.500 s, what is the induced emf in the coil? A circular coil with an area of 5.0 ´ 102cm2 and with 500 turns of wire is placed in a uniformmagnetic field perpendicular to the plane of the coil. If the fieldchanges in value from –0.100 T to +0.150 T in an interval of0.500 s, what is the induced emf in the coil?

Explanation / Answer

Area A = 5 * 10 ^ 2 cm ^ 2             = 5 * 10 ^ -2 m ^ 2 Change inmag.field dB = 0.15 + 0.1 = 0.25 T time interval dt = 0.5 s No.of truns N = 500 Induced emf E = N A dB / dt                        =12.5 V

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