The coil of an electric motor is made up of 200 turns of wire carrying a current of 1.0 A. The coil is square, with sides of length 20 cm, and it is placed in a magnetic field of flux density 0.05 T.
a. Determine the maximum force exerted on the side of the coil.
b. In what position must the coil be for this force to have its greatest turning effect?
c. List four ways in which the motor could be made more ‘powerful’ – that is, have greater torque.