Physics 0625 · IGCSE · Electric circuits

Electric circuits — practice question

Fig. 9.1 presents a circuit in which two lamps and three ammeters are connected in series to a power supply.
(a)[1]

Fill in the table with the currents that would appear on the other two ammeters.

(b)[1]

Find the total resistance of the lamps.

(c(i))[1]

State how the current from the power supply compares with the current in each lamp.

(c(ii))[1]

Compare the resistance of one lamp in this circuit with the total resistance of the two lamps connected in parallel.

(d)[4]

Calculate the potential difference (p.d.) across the resistor. State the unit.

Worked solution & mark scheme

This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: A2 = 0.6 A, A3 = 0.6 A

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