2022 · Specimen · 9702/01 | Q30

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CIE-9702-2022-SP-p01 · Question 30

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30 An electric current I is given by the formula I = Anvq. What do each of the symbols represent for an electric current in a metal wire? A n v q A area of number of free voltage charge of each cross-section electrons nucleus B area of number of free average drift charge of each cross-section electrons per unit speed of free electron volume electrons C current number of free average drift charge of each electrons speed of free nucleus electrons D current number of free voltage charge of each electrons per unit electron volume

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9702/01/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 1 · Question 30