A-LevelPhysicsElectricity9702/12 · Feb/Mar 2018 · Q331 Mark

A resistor has resistance R. When the potential difference across the resistor is V, the current in the resistor is I. The power dissipated in the resistor is P. Work W is done when charge Q flows through the resistor. What is not a valid relationship between these variables?

AI = P / V

BQ = W / V

CR = P / I²

DR = V / P

✓ Correct answer

D: R = V / P

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Topic: Electricity, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2018 Paper 1 Variant 2, question 33.

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