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O-LevelPhysicsElectricity5054/11 · Oct/Nov 2011 · Q281 Mark

The resistance of a cylindrical wire P is 80 Ω. A second wire Q is made from the same material. The cross-sectional area of Q is four times that of P. The length of Q is twice the length of P. What is the resistance of Q?

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A10 Ω
B40 Ω
C160 Ω
D640 Ω

✓ Correct answer

B: 40 Ω

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About this question

Topic
Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source
O-Level Physics, Oct/Nov 2011 Paper 1 Variant 1, question 28.

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