Question

A current of 4 ampere is flowing in a copper wire. If the same current is allowed to flow through another copper wire of double the radius, what is the effect on the drift velocity of free electrons?

Answer 1

Current is directly proportional to area of cross section The effect on drift velocity of free electrons will increase

Answer 2

drift velocity of electron will remains the same but current will increase due to increase in no of electrons passing per unit area