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If a coil of area 0.15m^(2) and 50 turns...

If a coil of area `0.15m^(2)` and 50 turns is perpendicular to a magnetic field, which changes from `5xx10^(-3)` to `2xx10^(-3)T` in 30 ms. Calculate the induced e.m.f.

Text Solution

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`A=0.15m^(2),N=50,dt=30xx10^(-3)s`
`dB=2xx10^(-3)-5xx10^(-3)=-3xx10^(-3)T`
`dphi_(B)=A.dB=0.15xx(-3xx10^(-3))=-0.45xx10^(-3)Wb`
`varepsilon=-N(dphi_(B))/(dt)=(-50xx(-0.45xx10^(-3)))/(30xx10^(-3))=0.75V`
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