Physics · May / June 2022 · Paper 62 · Question 2
0625
As printed in the paper
The question as text
A student investigates the resistances of combinations of resistors. The first circuit arrangement is shown in Fig. 2.1. A V RA RB Fig. 2.1
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
2(a)[1]
X marked anywhere in the series circuit
2(b)(i)[1]
I1 = 0.24 (A)
2(b)(ii)[1]
V1 = 2.2(0) (V)
2(c)[1]
R1 = 9.17 / 9.2 (Ω)
2(d)(i)[2]
RC in parallel with resistors in series
voltmeter across candidate’s combination AND the rest of the circuit correct
2(d)(ii)[1]
3.09 with unit Ω seen at least once in (c) (d) or (e) and not contradicted
2(e)[1]
R3 = 7.24 (Ω) to 2 or 3 significant figures
2(f)(i)[2]
use of a voltmeter and/or an ammeter
measure V and I for each resistor and calculate R OR
connect each resistor to the same voltage supply and measure the current OR
connect resistors in series and measure the voltage across each of them OR
connect resistors in parallel and measure the current through them
2(f)(ii)[1]
check to see if the results are equal / close / within 10%
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