Home
Class 12
PHYSICS
The drift velocity of free electrons in ...

The drift velocity of free electrons in a conductor is v, when a current i is flowing in it, Ifboth the radius and current are doubled, then the drift velocity will be :

A

v

B

`v//2`

C

`v//4`

D

`v//8`

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(d)=(i)/(n eA)=(i)/(n e(pir^(2)))impliesv_(d)prop(i)/(r^(2))`
Promotional Banner

Similar Questions

Explore conceptually related problems

The drift velocity of free elecrons in a conductor is v , when a current i is flowing in it. If both the radius and current are doubled, then the drift velocity wil be

The drift velocity of electrons is given by

The drift velocity of electron in a metal conductor under effective of elecrtic field applied is

Drift velocity of free electrons when current passes through the conductor is of the order of

When current is 4 A in a conductor the drift velocity is v_(d) When the current is 3 A the drift velocity will be

In a wire of cross-section radius r , free electrons travel with drift velocity v when a current I flows through the wire. What is the current in another wire of half the radius and of the same material when the drift velocity is 2v ?