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2 Electricity

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Question 83
F

When the potential difference across a component increases from 2.0 V to 8.0 V, the current in it increases from 0.10 A to 0.40 A. What is the resistance of the component?

[1]
A

4.0 Ω4.0\ \Omega4.0 Ω, because the potential difference increased by a factor of four

B

20 Ω20\ \Omega20 Ω, because the resistance falls as the current in it increases

C

20 Ω20\ \Omega20 Ω, because the ratio of p.d. to current is the same for both readings

D

80 Ω80\ \Omega80 Ω, because the two values of resistance must be added together

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2 Electricity Questions

  1. GCSE
  2. /Physics
  3. /2 Electricity

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