Physics · May / June 2022 · Paper 42 · Question 9
0625
As printed in the paper
The question as text
Fig. 9.1 shows a circuit with a 3-position switch. A C 12 V B Y X M Fig. 9.1 The moving part of the switch is always connected to point Y around which it pivots. The other end of the moving part, labelled X, can be connected to one of the points A, B or C.
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9(a)(i)[1]
0 (A)
9(a)(ii)[2]
(I = 12 / 2 =) 6.0 A
(I =) V / R in any form
C1
9(a)(iii)[2]
(I = 12 / 5 =) 2.4 A
(Rs = R1 + R2 = 2 + 3 =) 5 (Ω)
C1
9(b)[3]
(Rp = 6 / 5 =) 1.2 Ω
1 / Rp = 1 / R1 + 1 / R2 OR (Rp =) R1 R2 / (R1 + R2)
C1 1 / Rp = 1 / 2 + 1 / 3 OR (Rp =) 2 × 3 / (2 + 3)
C1
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