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4.3 Electric circuits

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Question 63

An engineer is designing a timer circuit to keep a security light illuminated for a short period after a switch is released. Which pair of electronic components is essential for determining the duration of this time delay?

A

A thermistor and a light-dependent resistor

B

A resistor and a capacitor

C

A diode and an inductor

D

A transformer and a variable resistor

Markscheme

4.3 Electric circuits Questions

  1. IGCSE
  2. /Physics
  3. /4.3 Electric circuits

136 exam-style questions on CIE IGCSE Physics 4.3 Electric circuits, covering 4.3.1a Circuit diagrams and circuit components, 4.3.2a Series circuits, 4.3.2b Parallel circuits, 4.3.2c Current and potential difference in circuits, 4.3.2d Combined resistance of resistors in parallel, and 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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