Physics · Oct / Nov 2023 · Paper 61 · Question 2
0625
As printed in the paper
The question as text
A student investigates the resistance of a resistance wire. Fig. 2.1 shows the circuit that he uses. A V l B sliding contact C resistance wire Fig. 2.1
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2(a)(i)[1]
I = 0.76(A)
2(a)(ii)[1]
V = 0.5
2(a)(iii)[1]
R = 0.7, 0.66 or 0.658
2(a)(iv)[1]
R / l = 0.035 or 0.033
2(a)(v)[2]
cm, V, Ω
Ω / cm
2(b)(i)[1]
Conclusion to match results. Expect R increases as l increases / (directly) proportional / R / l constant
2(b)(ii)[1]
Justification matching conclusion with clear reference to the results.
2(c)[3]
Correct method (e.g. doubling the 100 cm value, or taking average R / L or 0.033 then multiply by length)
Correct answer
Answer quoted to one or two significant figures
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