Which of the following characteristics of electrons determines the current in a conductor ?

Options

A. Drift velocity alone.
B. Thermal velocity alone.
C. Both drift velocity and thermal velocity.
D. Neither drift nor thermal velocity.

Explanation

Drift velocity alone.
Relation between current and drift velocity,
1 = nAv`a^(e) " "` where I = current
`v_(d)` = drift velocity
`therefore I prop v_(d) " " ` (n, A , e are same )
`therefore ` thus , drift velocity determine direction of current.