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4.3.3 Action and use of circuit components

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Question 2

A light-dependent resistor (LDR) is used in a control circuit to operate an electrical appliance automatically.

What might this circuit be designed to do?

A

Sounding a buzzer when a refrigerator door is left open

B

Operating a heating system when the indoor temperature drops

C

Turning on street lights automatically at dusk

D

Switching off a microwave oven after a set duration

Markscheme

4.3.3 Action and use of circuit components Questions

  1. IGCSE
  2. /Physics
  3. /4.3.3 Action and use of circuit components

67 exam-style questions on CIE IGCSE Physics 4.3.3 Action and use of circuit components. Each one has a worked solution and a mark scheme showing where the marks go.

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