For copper, ρ = 8.93 g/cm3 and m = 63.5 g/mol. assuming one free electron per copper atom, what is the drift velocity of electrons in a copper wire of radius 0.625 mm carrying a current of 3 a?

The drift velocity of electrons in a copper wire is

Explanation:

Given that,

Density

Mass

Radius = 0.625 mm

Current = 3 A

We need to calculate the drift velocity

Using formula of drift velocity

Where, n = number of electron

j = current density

We need to calculate the current density

Using formula of current density

Now, we calculate the number of electron

Using formula of number of electron

Now put the value of n and current density into the formula of drift velocity

Hence, The drift velocity of electrons in a copper wire is

if they have a finite resultant