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2.1 Current, potential difference and resistance

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Question 30
F

A diode is connected the wrong way round in a circuit. The potential difference across it is increased from 0 V to 5 V. What does the ammeter read?

[1]
A

Zero for every value, because the diode has a very high resistance this way

B

Zero at first and then a rising current once the p.d. reaches 5 V

C

A current that rises steadily in proportion to the potential difference

D

A current that is largest at 0 V and falls 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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