- #1

Izero

- 5

- 0

## Homework Statement

"The low [electron] density of a semiconductor means that the conduction electrons travel much faster than they do in conductors."

In order to fully understand this, I feel that I need to know why this occurs.

## Homework Equations

I = nAve

Where:

I = current

n = electron density

v = average drift velocity

e = charge on one electron

## The Attempt at a Solution

I know that, mathematically, the electrons need to travel faster in order for the current to be maintained, since current is flow of charge per unit time. I understand from the equation why this is the case, and the numbers make sense. However, I can't understand why the electrons would move faster just because there are fewer of them, and why the current doesn't just fall when a semiconductor is inserted into a circuit.