Physics 0625 · IGCSE · Electric circuits

Electric circuits — practice question

Fig. 10.1 shows a simplified version of a digital circuit. The output from logic gate Y operates a buzzer.
(a)[3]

Complete Table 10.1 by filling in the truth table for the circuit.

(b)[1]

State the humidity and light conditions when the buzzer is on.

(c)[3]

Ring the component in the list that must go between the output of the digital circuit and the buzzer: fuse, heater, relay, resistor, thermistor. Explain your answer.

Worked solution & mark scheme

This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: Every X output is correct (1,1,0,0)

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