Physics · Oct / Nov 2022 · Paper 61 · Question 2
0625
As printed in the paper
The question as text
A student investigates the resistance of a lamp. She uses the circuit shown in Fig. 2.1. A L C S D E resistance wire CE Fig. 2.1
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2(a)[1]
Correct voltmeter symbol across lamp
2(b)(i)[2]
V1 = 2.4(0)
I1 = 0.32(0)
2(b)(ii)[1]
R1 = 7.5
2(c)[1]
R2 = 5.8 / 5.83 to 2 or 3 significant figures
2(d)[1]
R3 = 5(.0) with unit Ω (here or seen in (a) or (b)(ii) and not contradicted)
2(e)[2]
1
decreases
2
decreases
2(f)[3]
Correct symbol for variable resistor
Variable resistor in series with power source and ammeter
Ammeter and lamp with correct symbols and no flying lead at all
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