Physics · May / June 2022 · Paper 42 · Question 8
0625
As printed in the paper
The question as text
Fig. 8.1 shows how the electromotive force (e.m.f.) of a 60 Hz alternating current (a.c.) power supply varies with time. time period e.m.f. time 0 0 Fig. 8.1
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8(a)[1]
(t = 1/60 =) 0.017 s OR 1.7 × 10–2 s
8(b)(i)[1]
diode
8(b)(ii)[3]
(I =) 1.4 A
(I =) Q / t in any form
C1 (I =) 1.5 × 1017 × 1.6 × 10–19 / 0.017 OR 0.024 / 0.017
C1
8(c)[2]
one arrow clockwise AND one arrow anticlockwise
arrow anticlockwise (around circuit) labelled I
8(d)[2]
(P = 0.35 × 12 =) 4.2 W
(P =) IV in any form
C1
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