Question

If potential difference V applied across a conductor is increased to 2V ,how will the drift velocity of the electron change?

Answer 1

The drift velocity will double as drift velocity is proportional to the potential difference applied

Answer 2

Answer:

Drift velocity becomes twice.

Explanation:

Drift velocity of electron is given by :

$v=\dfrac{I}{neA}$..........(1)

Where

I is the current flowing

n is the number of charge per unit volume

a is the charge on electron

A is the area of cross section.

According to Ohm's law :

$V=IR$..............(2)

Where

V is the potential difference

R is the resistance of the wire

Putting the value of I from equation (2) to (1) :

$v=\dfrac{V}{RneA}$

So, if potential difference V applied across a conductor is increased to 2 V, then the drift velocity also becomes twice because drift velocity is directly proportional to the potential difference.