Physics · Oct / Nov 2022 · Paper 41 · Question 8
0625
As printed in the paper
The question as text
The unit of the two electrical quantities electromotive force (e.m.f.) and potential difference (p.d.) is the volt (V).
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
8(a)[1]
both relate to energy per unit charge
8(b)[1]
e.m.f. applies to the whole circuit / source or p.d. to one (or more) component or energy conversion to electrical for e.m.f. or from electrical for p.d.
8(c)(i)[1]
4.8 V
8(c)(ii)[3]
20 Ω
1 / RT = 1 / R1 + 1 / R2 or (RT =) R1 R2 / (R1 + R2) or 1 / RT = 1 / 24 + 1 / 12
or 1 / RT = 3 / 24 or (RT =) 24 × 12 / (24 + 12)
8.0 (Ω)
8(c)(iii)[2]
2.9 V
V = ER / RT in any form or 4.8 × 12 / 20 or I = E / R in any form or 0.24 seen
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.