Physics · May / June 2020 · Paper 62 · Question 2
0625
As printed in the paper
The question as text
A student determines the resistance of a resistance wire. Fig. 2.1 shows the circuit he uses. A V power supply B resistance wire sliding contact C l Fig. 2.1
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2(a)[3]
V = 0.2
I = 0.28
cm, V, A
2(b)[4]
graph:
axes correctly labelled and right way round
suitable scales
all plots correct to 1
2 small square
good line judgement, thin, continuous line
2(c)(i)[1]
conclusion matching readings (expect I constant)
2(c)(ii)[1]
justification to match (i) with reference to results expect I values very close / equal
2(d)[2]
method shown clearly on graph
VL correct to 1
2 small square
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