The direction of rotation is reversed. State how this affects the induced e.m.f.
Important Questions on Electromagnetic Induction
Alternating current is generated using an a.c. generator. This is similar to an electric motor, working in reverse. Write the missing word.
An a.c. generator does not have a commutator. Instead, current enters and leaves the spinning coil through brushes that press on the .
For given below diagram shows how an alternating current varies with the time. On the diagram, mark one cycle of the alternating current.
The below diagram shows a step-up transformer. State which coil has more turns in such a transformer.
For the given diagram, label the primary coil, the secondary coil, and the iron core.
In the circuit diagram, a transformer is being used to change the mains voltage to a lower value so that it will light a amp.
State whether this is a step-up or step-down transformer.
