Question

The current flowing in a conductor is proportional to
(a) drift velocity
(b) 1/ area of cross section
(c) 1/no of electrons
(d) square of area of cross section.

Answer 1

We know the relation $\mathbf{I=neAV_d}$
Where I current through wire,
n is numberof electrons per unit volume
A is cross section area of wire
e is the charge on each electron
and $V_d$ is drift velocity .
Here it is clear that , current is directly proportional to dift velocity , number of electrons per unit volume , cross section area of wire .
Hence, option (a) is correct choice.

Answer 2

Answer:

The current flowing in a conductor is proportional to drift velocity