A cylinder has been formed from modelling clay, and the modelling clay conducts electricity. Figure 8.1 shows the cylinder. It is linked into a circuit. Figure 8.2 shows that the circuit also contains a battery with electromotive force (e.m.f.) 9.0 V and a resistor P. The resistance of P is 4.0 Ω. The current in P is 1.5 A.
(a(i))[2]
Calculate the magnitude $X$ of the charge that passes through P in 600 s.
(a(ii))[3]
Calculate the resistance of the cylinder made of modelling clay.
(b)[4]
Calculate the time that it now takes for a charge of magnitude $X$ to pass through resistor P.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Q = It, or equivalently I = Q / t” …