A circular coil of wire of diameter 0.125 m containing three loops lays flat on

Question

A circular coil of wire of diameter 0.125 m containing three loops lays flat on a table in a uniform magnetic field directed straight upward. the strength of the magnetic field decreases steadily from 0.5×10^-4T to zero over a time period of 0.4 seconds. during this time what EMF is induced in the coil? A circular coil of wire of diameter 0.125 m containing three loops lays flat on a table in a uniform magnetic field directed straight upward. the strength of the magnetic field decreases steadily from 0.5×10^-4T to zero over a time period of 0.4 seconds. during this time what EMF is induced in the coil? A circular coil of wire of diameter 0.125 m containing three loops lays flat on a table in a uniform magnetic field directed straight upward. the strength of the magnetic field decreases steadily from 0.5×10^-4T to zero over a time period of 0.4 seconds. during this time what EMF is induced in the coil?

Explanation / Answer

flux = BA = 0.5×10^-4 * 3.14* (0.125/2)^2 =0.006133 T-m^2

Induced EMF = -Ndelta(flux)/dt = -3* 0.006133 /0.4 = 45.99 mV

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