Physics · May / June 2020 · Paper 41 · Question 7
0625
As printed in the paper
The question as text
An electromagnet consists of a solenoid X that is made of copper wire. The solenoid contains an iron core.
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7(a)(i)[2]
(copper) contains free electrons
good electrical conductor
7(a)(ii)[2]
magnetic material OR easily magnetised
temporary magnetic material OR easily demagnetised
7(b)(i)[3]
alternating / changing / varying magnetic field (produced by X)
(electromagnetic) induction in Y
(alternating) electromotive force (e.m.f.) between terminals of Y / in Y
7(b)(ii)[2]
current in X increases
to supply the power used in Y / the lamp
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