A flat square coil with 230 turns has sides of length 0120 m

A flat, square coil with 23.0 turns has sides of length 0.120 m. The coil rotates in a magnetic field of 2.90x10^-2 T. Part A What is the angular velocity of the coil if the maximum emf produced is 20.0 mV ? Part B What is the average emf at the angular velocity found in part A?

Solution

The maximum emf of batery is

      =NAB

thus, the angular velocity is,

    = / NAB

      = 20x10^-3 / 23*0.12*0.12*0.029

= 2.08 rad/s

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the average emf during one rotation is, zero.