A 2.50 A current is carried by a copper wire of radius 1.0 mm. If the density of conduction electrons is 8.0 × 10²⁸ m⁻³, what is the drift velocity of the conduction electrons? A) 3.0 × 10⁸ m/s B) 3.2 × 10⁻⁴ m/s C) 1.6 × 10⁻⁵ m/s D) 6.2 × 10⁻⁴ m/s E) 6.2 × 10⁻⁵m/s

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Quizplus · Accepted Answer

The drift velocity $ v_d $ can be calculated using the formula $ I = nAev_d $, where $ I $ is the current, $ n $ is the density of conduction electrons, $ A $ is the cross-sectional area, and $ e $ is the charge of an electron. Solving for $ v_d $ gives $ v_d = \frac{I}{nAe} $. Substituting the given values and solving gives $ v_d \approx 6.2 \times 10^{-5} $ m/s.

A 250 a Current Is Carried by a Copper Wire of of Radius