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A coil of 800 turns 50 cm^(2) area makes...

A coil of `800` turns `50 cm^(2)` area makes `10 rps` about an axis in its own plane in a magnetic field of `100` gauss perpendicular to the this axis. What is the instantaneous inducted emf in the coil ?

Text Solution

Verified by Experts

`A =50 cm^2=50xx10^(-4)m^2`
n=10 rps, N=800
B=100 gauss `100xx10^(-4)T=10^(-2)T`
Now
`=800xx10^(-2)xx50xx10^(-4)xx2pixx10 sin (20pit)`
`varepsilon=varepsilon_0 sin omegat=NBA omega sin omegat`
or `varepsilon=2.5 sin (20pit)`volt
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