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(a) State what is meant by the term “electromagnetic induction”.
(b) Figure 9, shows a simple electric generator.
(i) Name the parts labeled P and Q.
(ii) Sketch on the axis provided, a graph to show how the magnitude of the potential difference across R, changes with the time, t.
(iii) State two ways in which the potential difference produced by such a generator can be increased.
(c) In a transformer, the ratio of primary turns to the secondary turns is 1:10. A current 500mA flows through a 200Ω resistor in the secondary circuit.
Assuming that the transformer is 100% efficient, determine:
(i) The secondary voltage;
(ii) The primary voltage.