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4.3 Electric circuits

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Question 64

An engineer designs a potential divider circuit for a greenhouse ventilation system so that when the temperature becomes too high, a cooling fan turns on.

Which sensor component does the engineer need to use in addition to a resistor to detect the change in temperature?

A

light-dependent resistor

B

thermistor

C

relay

D

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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