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3.2 Simple circuits

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Question 11
H

A 12 V power supply is connected in series with a 15 Ω resistor and a filament lamp.

The current in the circuit is 0.40 A.

a.

Calculate the resistance of the lamp.

[3]
b.

Calculate the power transferred in the resistor.

[2]
c.

Calculate the energy transferred by the lamp in 5.0 minutes.

[3]
d.

The 15 Ω resistor is replaced by a 5.0 Ω resistor. The lamp becomes brighter.

Explain why.

[2]
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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