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2.1 Current, potential difference and resistance

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Question 31
F81%

Why must the current in the wire be kept small during an investigation into how the resistance of a wire depends on its length?

[1]
A

So the reading on the ammeter does not go above its full scale

B

So the potential difference across the wire stays the same throughout

C

So the charge flowing in the wire is not used up too quickly

D

So the wire does not heat up, which would change its resistance

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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