O-LevelPhysicsElectricity5054/12 · Oct/Nov 2024 · Q301 Mark

X is a piece of wire with length l, area a and resistance R. Wire Y is made from the same material and is connected to wire X to produce a component with a total resistance of R/2. What are the dimensions of Y and how is it connected to X? [Table: length, area, connection]

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ARow A: 2l, 0.25a, in parallel

BRow B: 2l, 0.25a, in series

CRow C: 4l, 4a, in parallel

DRow D: 4l, 4a, in series

✓ Correct answer

C: Row C: 4l, 4a, in parallel

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Topic: Electricity, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2024 Paper 1 Variant 2, question 30.

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