1Turn the switch on for a moment and observe the wire. Did the wire move in any direction?
2Record the direction of wire movement before and after changing the poles of the battery. What is the result?
3Is it possible to generate an electric current from a conducting wire placed in a magnetic field, just the way a magnetic field is developed around the wire when an electric current passes through it?
4What is the motor effect? Name three appliances that work by it.
5Explain why a current-carrying wire placed between the poles of a magnet moves.
6How does the coil of an electric motor rotate?
7Write four measures that increase the speed of rotation of the coil of a motor.
8Why must the wire of a motor coil be insulated?
9What energy change takes place in an electric motor?
10If the current in the wire and the poles of the magnet are both reversed at the same time, which way does the wire move? Give a reason.