Electromagnetic induction - Higher - Edexcel

1

What is another name for electromagnetic induction?

2

How can the direction of an induced potential be reversed?

3

How is contact between the coil and circuit maintained in an alternator?

4

What is the voltage from an alternator half a turn after maximum positive output?

5

How can the voltage output from an alternator be doubled?

6

How can the voltage output from a dynamo be doubled?

7

In a dynamo, what is the function of the split ring commutator?

8

What is the function of a microphone?

9

How does a moving-coil microphone create electrical signals?

10

Why could a loudspeaker be said to be a reverse microphone?