An alternating current mains electricity supply has a frequency of 50 Hz, and its maximum voltage is 300 V.
(a)[3]
On the axes in Fig. 7.1, draw a graph to show how the supply voltage changes during 0.05 s.
(b(i))[1]
The transformer core is made of iron. Explain why iron is an appropriate material for the transformer core.
(b(ii))[3]
Explain why a voltage is produced across the secondary coil.
(b(iii))[2]
The secondary coil has 60 turns. Calculate the maximum voltage across the secondary coil.
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