A-LevelPhysicsElectricityOct/Nov 2017Paper 1 Q331 Mark
Two copper wires are joined together and carry a current, as shown. [Figure showing two copper wires P (diameter d) and Q (diameter 2d) joined in series carrying a current] Wire P has diameter d and wire Q has diameter 2d. What is the ratio average drift speed of the free electrons in wire P / average drift speed of the free electrons in wire Q?
A1/4
B1/2
C2
D4
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The correct answer is D. This question tests the candidate's understanding of electricity within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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