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3.2 Simple circuits

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Question 21
H

An NTC thermistor and a fixed resistor are connected in series with a battery.

The temperature of the thermistor increases.

Which statement describes and explains what happens to the potential difference across the fixed resistor?

[1]
A

It decreases, because the current in the circuit decreases

B

It decreases, because the thermistor now takes a larger share

C

It stays the same, because the battery potential difference is fixed

D

It increases, because the current in the circuit increases

Markscheme

3.2 Simple circuits Questions

  1. GCSE
  2. /Physics
  3. /3.2 Simple circuits

42 exam-style questions on OCR GCSE Physics 3.2 Simple circuits, covering 3.2.1 Series and parallel circuits, 3.2.2 Circuit symbols and circuit diagrams, 3.2.3 Current, potential difference and resistance, 3.2.4 Ohm's law, 3.2.5 Ohmic and non-ohmic resistors, 3.2.6 Designing circuits to investigate resistance, 3.2.7 Linear and non-linear circuit components, 3.2.8 Current-potential difference graphs for components, 3.2.9 Resistance in series and parallel, 3.2.10 Series and parallel circuit problems, 3.2.11 Circuits for measurement and testing, 3.2.12 Power transfer in circuit devices, and 3.2.13 Energy and power in resistor circuits. Each one has a worked solution and a mark scheme showing where the marks go.

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