Exam Prep for Physics | Channels for Pearson+

Skip to main content

My Courses

AI Tools Channels Home

27. Resistors & DC Circuits - Part 1 of 2

27. Resistors & DC Circuits - Part 1 of 2

27. Resistors & DC Circuits / Microscopic View of Current / Problem 12

Determine the drift speed of the electron, given that 2.1 × 10¹⁹ electrons pass through a cross-section of a 1.4 mm diameter copper wire in 12s. The number density of electrons in copper is 8.5 × 10²⁸ m^-3.

A

2.3 × 10^-6 m/s

B

3.8 × 10^-5 m/s

C

1.3 × 10^-5 m/s

D

4.1 × 10^-6 m/s

Was this helpful?

Learn this concept