A copper wire of cross-sectional area `3.00xx10^(-6) m^2` carries a current `10.0A`.
a. Find the drift speed of the electrons in the wire. Assume that each copper atom contributes one free electron to the body of material.
b. Find the average time between collisions for electrons in the copper at `20^@C.` The density of copper is `8.95 gcm^(-3)`, molar mass of copper is `63.5 gmol^(-1)`, Avogadro number is `6.02xx10^(23)` electrons per mol and resistivity of copper is `1.7 xx10^(-8) Omegam.`

Options

A. `"0.24 m s"^(-1)`
B. `"0.12 m s"^(-1)`
C. `"2.4 m s"^(-1)`
D. `"0.06 m s"^(-1)`

Answer

B