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2.1 Current, potential difference and resistance

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Question 32
F

For a filament lamp, the current is 0.50 A when the potential difference is 2.0 V, and 1.5 A when the potential difference is 12 V. What happens to the resistance of the lamp between these two readings?

[1]
A

It stays constant at 4.0 Ω4.0\ \Omega4.0 Ω, because the lamp is an ohmic conductor

B

It decreases from 8.0 Ω8.0\ \Omega8.0 Ω to 4.0 Ω4.0\ \Omega4.0 Ω as the potential difference rises

C

It increases from 1.0 Ω1.0\ \Omega1.0 Ω to 18 Ω18\ \Omega18 Ω as the potential difference rises

D

It increases from 4.0 Ω4.0\ \Omega4.0 Ω to 8.0 Ω8.0\ \Omega8.0 Ω as the potential difference rises

Markscheme

2.1 Current, potential difference and resistance Questions

  1. GCSE
  2. /Physics
  3. /2.1 Current, potential difference and resistance

82 exam-style questions on AQA GCSE Physics 2.1 Current, potential difference and resistance, covering 2.1.1 Standard circuit diagram symbols, 2.1.2 Electrical charge and current, 2.1.3 Current, resistance and potential difference, and 2.1.4 Resistors. Each one has a worked solution and a mark scheme showing where the marks go.

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