Question #32095

The potential difference across a given copper wire is doubled. what happens to the drift velocity of the charge carriers?

Expert's answer

Drift velocity depends on average kinetic energy of electronas

v = sqrt(2E/m)

If we double potential difference, the average energy willalso double, as E=q*U, where U is potential difference.

Hence, drift velocity will change in

sqrt(2*2E/m)/sqrt(2E/2) = sqrt(2) times.

Answer: drift velocity will grow in sqrt(2) times

v = sqrt(2E/m)

If we double potential difference, the average energy willalso double, as E=q*U, where U is potential difference.

Hence, drift velocity will change in

sqrt(2*2E/m)/sqrt(2E/2) = sqrt(2) times.

Answer: drift velocity will grow in sqrt(2) times

## Comments

## Leave a comment