4.1.2: Mean Drift Velocity

Question 1

Mean Drift Velocity

Answer 1

The average direction and speed that the charge carriers travel with in a circuit. It is average as some are going the other way due to collisions with cations in metal.

Question 2

I = AneV

Answer 2

I - Current
A - Cross sectional area
n - Number density of charge carriers
e - Elementary charge
V - Potential difference

Question 3

Conductor number density

Answer 3

10^28 free electrons per cubic metre

Question 4

Semiconductor number density

Answer 4

10^17 free electrons per cubic metre

Question 5

Insulator number density

Answer 5

Very low number density