Question

A simple AC generator consists of 20 coils of wire with an area of 1000 cm² and placed in a region where the magnetic field is 0.5 T. What would be the rotational frequency to generate a peak electromotive force of 220 V?

Answer 1

$$E_{max}=NBA\omega$$

$$\omega=E_{max}/(NBA)$$

$$\omega=220/(20*0.5*1000*10^{-4})=220\:\rm rad/s$$