Fig. 9.1 shows a circuit made up of two resistors, a battery, a voltmeter and a switch, all joined by metal wires. The labels on Fig. 9.1 are: 12 V, A 10 Ω, B 20 Ω, V.
(a)[1]
State one quantity measured by a voltmeter.
(b(i))[1]
State the name of the particle type that moves through the metal wires.
(b(ii))[1]
State the name of an instrument used to measure electric current.
(c(i))[3]
Calculate the current through the 10 Ω resistor. current = ......................... A
(c(ii))[1]
Determine the current in the 20 Ω resistor. current = ......................... A
(c(iii))[2]
State the effect, if any, on the current in the circuit. Explain your answer.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “potential difference / p.d. / voltage / electromotive force / e.m.f.” …