Question

A circular coil of radius 8.0 cm and 20 turns is rotated about its vertical diameter with an angular speed of 50 rad s^-1 in a uniform horizontal magnetic field of magnitude
3.0 x 10^-2 Obtain the maximum and average emf induced in the coil. If the coil forms a closed loop of resistance 10 q, calculate the maximum value of current in the coil. Calculate the average power loss due to Joule heating. Where does this power come from?

Answer 1

Here, radius of coil,

r = 8.0 cm = 8 x 10^-2 m

number of turns, n = 20;

ω = 50 rads^-1;

B = 3.0 x 10^-2 T area of coil,

The external agent, which keeps the coil rotating, is the source of this power.