Physics 0625 · IGCSE · Electric circuits

Electric circuits — practice question

Fig. 9.1 shows a circuit diagram made up of three resistors and three identical 1.5 V cells.
(a)[1]

State the total electromotive force (e.m.f.) supplied by the three 1.5 V cells connected in series.

(b(i))[2]

Calculate the equivalent resistance of the resistors arranged in parallel.

(b(ii))[1]

Calculate the circuit's total resistance.

(b(iii))[2]

Calculate the current in the $55\,\Omega$ resistor.

(c(i))[1]

State the resistance of the resistor with the greatest current.

(c(ii))[1]

State the resistance of the resistor with the smallest current.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: The total is 4.5 V.

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