Physics · May / June 2022 · Paper 61 · Question 3
0625
As printed in the paper
The question as text
A student investigates the resistance of a wire. Fig. 3.1 shows the circuit he uses. A V l B C sliding contact S resistance wire Fig. 3.1
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
3(a)[1]
a position in series with power supply, ammeter and BC
3(b)[1]
I = 0.38 (A)
3(c)[1]
V = 2.6
3(d)(i)[1]
R = 6.84
3(d)(ii)[1]
V, Ω
3(e)[4]
graph:
axes correctly labelled with quantity and unit and right way round
suitable scales
all plots correct to ½ small square
good line judgement, thin, continuous line
3(f)[2]
method shown clearly on graph
R value correct to nearest ½ small square
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