(a)[2]
Draw a labelled diagram to show how a transformer that raises voltage is arranged.
(b)[3]
Describe the operating principle of a transformer.
(c)[2]
Explain one benefit of transmitting electricity at a high voltage.
Physics 5054 · O Level · The transformer
The transformer — practice question
For electricity sent over long distances, a transformer is first used to raise the voltage before transmission. At the far end, a second transformer lowers the voltage back to the normal mains value.