Physics 0625 · IGCSE · Electric circuits

Electric circuits — practice question

As shown in Fig. 7.1, a battery, lamp L, fixed resistor R and switch S are connected together.
(a)[3]

Calculate the resistance in lamp L.

(b)[3]

State and explain how closing switch S changes the brightness of lamp L.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Using the equation: $V = I R$ OR $R = V / I$” …

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