The drift velocity of free electrons in a conductors is `v_(o)` when the current `i` is flowing in it . If both the radius and current are doubled , the drift velocity will be

Options

A. The random speed of electons is very high, of the order of `10^(6)m//s`.
B. The electrons transfer their energy very quickly through collisions
C. Electric field is set up in the wire very quickly, producing a current through each cross section, almost instantaneously.
D. All of above

Answer

C