Home
Class 12
PHYSICS
For a metal of atomic weight 60g, the ar...

For a metal of atomic weight 60g, the area of cross section of a piece of metal is `10^(-6)m^(2)`, length is 1m and density is `5 xx 10^(3)kg//m^(3)`. If every atom contribute one free electron, find the drift velocity of electrons in the metal when a current of 20A passes thorugh it.

A

`25 xx 10^(-3)m//s`

B

`2.5 xx 10^(-3)m//s`

C

`4.5 xx 10^(-3)m//s`

D

`5 xx 10^(-3)m//s`

Text Solution

Verified by Experts

Promotional Banner

Similar Questions

Explore conceptually related problems

A current of 3.2A is flowing in a wire of area of cross section 1 xx 10^(-7)m^(2) . The number of free electrons in the wire is 2 xx 10^(28) "per" m^(3) . Determine the drift velocity of electrons.

A current 10 A is maintained in a conductor of cross section 10^(-4)m^(2) . If the number density of free electrons be 9 xx 10^(28) m^(-3) . Calculate the drift velocity of free electrons. ( e = 1.6 x 10^(-19)C)

In copper the number of free electrons per m^(3) is 8.4 x 10^(28). Calculate the drift velocity of electrons in a copper wire of cross sectional area 2 x 10^(-6)m^(2), if a current of 0.63A is flowing through it.

The thermal velocity of electron is about 10^6 m/s and drift velocity is about 10^(-3) m/s. Obtain a relation between drift velocity and electric current.