A-LevelPhysicsElectricity9702/12 · Feb/Mar 2025 · Q301 Mark
Two cylindrical conductors, X and Y, are made from the same material. The conductors have equal lengths, but Y has a smaller diameter than X. X and Y are connected in series to a cell. Which row compares the number of charge carriers per unit time passing through X and through Y and compares the average drift speed of the charge carriers in X and in Y?
Anumber of charge carriers per unit time: Y greater than X, average drift speed of charge carriers: Y greater than X
Bnumber of charge carriers per unit time: Y same as X, average drift speed of charge carriers: Y same as X
Cnumber of charge carriers per unit time: Y greater than X, average drift speed of charge carriers: Y same as X
Dnumber of charge carriers per unit time: Y same as X, average drift speed of charge carriers: Y greater than X
✓ Correct answer
D: number of charge carriers per unit time: Y same as X, average drift speed of charge carriers: Y greater than X
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