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3.2 Simple circuits

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Question 13
F

A second resistor is connected in parallel with a resistor that is already in a circuit.

Which statement explains why the total resistance of the circuit decreases?

[1]
A

The charge must flow through both resistors, so the total current decreases

B

Each resistor now has half of the potential difference of the battery across it

C

The charge has more paths to flow through, so the total current increases

D

The current in the first resistor decreases, so the resistance of that resistor falls

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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