Question

In the figure given below, a simple electric motor is shown : As shown in the figure, the current in the coil ABCD flows from A to B in the arm AB and C to D in the arm CD. (i) State the directions in which the arms AB and CD will experience a force. (ii) Identify the part of the electric motor that reverses the flow of current in the coil ABCD and write its name. (iii) After the reversal of flow of current in the coil ABCD, state the directions in which the arms AB and CD will experience a force. (iv) Name the rule which is applied to determine the direction of force on a current carrying conductor placed in a magnetic field.