a rectangular coil of n turns area a is held in a uniform magnetic field b.if the coil is rotated with steady angular speed w,duduce an expression for induced emf in the coil at any instant of time.

Dear Student ,
Here in this case the rectangular coil of n turns , area 'a' is held in an uniform magnetic field b .
Now the coil is rotated with angular speed ω .
Now , we know that , electric flux , ϕ=nbacosθ=nba cosωt  θ =ωt
Now the induced emf  at time instant 't' =  E=-dϕdt=dnba cosωtdt=nabωsinωtE =E0 sinωtWhere , E0=nabω
Regards
 

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