Physics · May / June 2024 · Paper 42 · Question 8
0625
As printed in the paper
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8(a)(i)[1]
correct voltmeter symbol connected across LDR
8(a)(ii)[3]
(resistance) increases
(p.d.) increases because resistance of parallel combination of LDR and LED increases
greater proportion of (total) p.d. across LDR / LED / parallel combination of LDR and LED
8(b)[3]
960 Ω
current in each bulb = 0.25 OR R = V / I OR (R =) V / I
resistance = 240 / 0.25 OR 1 / 480 = 1 / R + 1 / R
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