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AP Physics 2
11.1 Electric Current
BeginnerMCQMathematical18.9k
A horizontal cylindrical wire segment of cross-sectional area A. Inside the cylinder, several small circular particles labeled e are shown moving to the right with velocity vectors labeled v_d. A circular cross-sectional slice of area A is shaded at the right end of the segment. An arrow along the length indicates a distance segment delta x. No other labels, lines, text, or axes appear.
Segment of a cylindrical conductor containing moving charge carriers.
A cylindrical conductor has a uniform cross-sectional area \(A\). The conductor contains a free charge carrier density \(n\) (number of charge carriers per unit volume), where each carrier has a charge magnitude \(e\). If the charge carriers move through the conductor with an average drift speed \(v_d\), which of the following expressions represents the electric current \(I\) passing through a cross section of the conductor?

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