Physics (AS & A Level) · May / June 2018 · Paper 11 · Question 30
9702Electric current
The current I in a metal wire is given by the expression shown. I = Anvq What does the symbol n represent?
- Athe number of atoms per unit volume of the metal
- Bthe number of free electrons per atom in the metal
- Cthe number of free electrons per unit volume of the metal
- Dthe total number of electrons per unit volume of the metal
As printed in the paper
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Correct answer: C. the number of free electrons per unit volume of the metal
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