A coil of area 500 `cm^(2)` having 1000 turns is put perpendicular to a magnetic field of intensity `4xx10^(-5)`T. if it is rotated by `180^(@)` in 0.
A coil of area 500 `cm^(2)` having 1000 turns is put perpendicular to a magnetic field of intensity `4xx10^(-5)`T. if it is rotated by `180^(@)` in 0.1 s, the induced emf produced is
A. 20 mV
B. 40 mV
C. 60 mV
D. 80 mV
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Correct Answer - B
`e=(dphi)/(dt)=(nAB)/(dt)(costheta_(1)-costheta_(2))`
`e=(2xx1000xx500xx10^(-4)xx10^(-5))/(0.1)=40mV`
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