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A coil of area 500 cm^(2) having 1000 tu...

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

Text Solution

Verified by Experts

The correct Answer is:
B
`e=(dphi)/(dt)=(nAB)/(dt)(costheta_(1)-costheta_(2))`
`e=(2xx1000xx500xx10^(-4)xx10^(-5))/(0.1)=40mV`
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Knowledge Check

  • A coil of area 0.05 m^(2) and 500 turns is placed in a magnetic field of strength 4 xx 10^(-5) tesla. If it is rotated through 90^(@) in 0.1 sec, then the magnitude of e.m.f. Induced in the coil will be

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