Which one of the following expresses the current in a conductor in terms of drift velocity

PHYSICS · Single correct · A Level · Physics · Electricity · Electricity

Problem

Which one of the following expresses the current

I

in a conductor in terms of drift velocity

v_d

, number density of charge carriers

n

, electronic charge

e

and cross-sectional area

A

? (a)

I = \dfrac{n e A}{v_d}

(b)

I = n e A v_d

(c)

I = \dfrac{n e v_d}{A}

(d)

I = n e^{2} A v_d