Theory: answer each printed part. For drawings, upload a clear photo of your sketch on the supplied figure; show working and units for calculations.
(a)Read question and case materials as text
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Fig. 6.1 shows two identical 1.5 V cells in parallel, ammeters 1 and 2, series resistors R and S, and thermistor T. Ammeter 1 reads 0.20 A.
Explain why ammeter 2 also reads 0.20 A.
Fig. 6.1 shows two identical 1.5 V cells in parallel, ammeters 1 and 2, series resistors R and S, and thermistor T. Ammeter 1 reads 0.20 A.
Fig. 6.1
Explain why ammeter 2 also reads 0.20 A.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[1 mark]
(b)(i)
R = 1.5 Ω and S = 3.5 Ω. Calculate the resistance of T.
Answer guidance
Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.
[3 marks]
(b)(ii)
The temperature of T rises. Explain why the potential difference across T decreases.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[3 marks]
5054/21/O/N/23Cambridge O Level Physics 5054 · Oct/Nov 2023 · Paper 2 variant 1 · Question 6