Physics · May / June 2020 · Paper 42 · Question 8
0625
As printed in the paper
Show the answer and mark scheme
8(a)[4]
two circuit symbols correct
three circuit symbols correct
symbol for cell, battery or power supply AND two other circuit symbols in series
LED correct way round
8(b)[2]
R = V / I in any form OR (R =) V / I
(R = 3.1 / 0.030 =) 100 Ω
8(c)(i)[2]
uses 10.5 = 2.1 + V across heater
(R = 8.4 / 1.5 =) 5.6 Ω
8(c)(ii)[2]
P = VI in any form OR (P =) VI
(P = 8.4 × 1.5 =) 12.6 W
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