Q. 7

Expert-verifiedFound in: Page 762

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

A electric field creates a electrons/s current in a diameter aluminum wire. What are (a) the drift speed and (b) the mean time between collisions for electrons in this wire?

a. The drift speed is

b. The mean time between collisions for electrons in this wire is

Electric field

Timeelectron/s

Aluminum wire diameter

The drift speed can be found as

Since the cross-section is a circle, the area is ,

Substitute the values,

Hence, the drift speed is

Electric field

Time electron/s

Aluminum wire diameter

We Know the drift speed, we can find the mean time as,

However, if we trust our previous solution, we could use the parametric solution in place of

Hence, the mean time between collisions for electrons in this wire is

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