Question

A copper rod of cross-sectional area a carries a uniform current i through it. At temperature t, if the volume charge density of the rod is , how long will the charges take to travel a distance d ?

Answer 1

Hey dear,

● Answer- t = pdA/I

◆ Explaination-
Let ρ be volume charge density of the sphere.

Suppose a current I is passed through it to transfer charge q to a distance d in time t.
ρ = q / V
ρ = It / Ad
t = ρAd / I

The charge will take ρAd/I s to travel distance d.

Hope that is helpful.