The armature of a small generator consists of a flat, square coil with 150 turns and sides with a length of 2.00 cm. the coil rotates in a magnetic field of 8.20×10−2 t. what is the angular speed of the coil if the maximum emf produced is 2.50x10^-2?

Angular speed of the coil 5.08 rad/s

Solution:

As per the solution:

No. of turns, N = 150 turns

Length of the coil, l = 2.00 cm

Magnetic field, B =

Maximum emf,

Now,

Instantaneous emf,

where

= flux

= angular speed

Maximum emf is obtained at

2b2t

explanation:

2b2t