Physics (AS & A Level) · Feb / March 2021 · Paper 12 · Question 32
9702Electric current
The current I in a metal wire is given by the equation I = Anvq. What does the symbol n represent?
- Athe number of charge carriers in the wire
- Bthe number of charge carriers per unit cross-sectional area of the wire
- Cthe number of charge carriers per unit length of the wire
- Dthe number of charge carriers per unit volume of the wire
As printed in the paper
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Correct answer: D. the number of charge carriers per unit volume of the wire
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