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1
A uniform magnetic field is applied perpendicular to the plane of a 60-turn circular coil with a radius of 6.0 cm and a resistance of 0.60 ohms. If the magnetic field increases uniformly from 0.20 T to 1.8 T in 0.20 s, what is the magnitude of the emf induced in the coil?
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Added Mon, 20 Jul '15
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induced emf is defiend as the rate of change of magnetic flux
in mathematical form,
induced emf e = NAdB/dt
where A = area
N = no. of tunrs
dB/dt = rate of change of amgnetic flux

so emf e = 60 * 3.14 * 0.06*0.06 * (1.8-0.2)/0.2

emf = 5.4259 volts
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Added Mon, 20 Jul '15
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