A copper wire has a resistance of `10 Omega ` and an area of cross-section `1 mm^(2)`. A poetential difference of 10 V exists across the wire. Calculate the drift speed of electrons if the number of electrons per cubic metre in copper is `8xx10^(28)` electrons.

A copper wire has a resistance of 10 Omega and an area of cross-section 1 mm^(2) . A potential difference of 10 V exists across the wire .Calculate the drift speed of the electrons if the number of electrons per cubic metre in copper is 8 xx 10^(21) electrons.

There is a copper wire of radius 1mm and it carries a current of 2 ampere, calculate the drift speed of electrons assuming there are 8.5 xx10^(28) free electrons per metre cube.

There is a current of 20 amperes in a copper wire of 10^(-6) square metre area of cross-section. If the number of free electrons per cubic metre is 10^(29) then the drift velocity is

A current of 1.0 A exists in a copper wore of cross-section 1.0mm^(2) .Assuming one free electron per atonm calculate the drift speed of the free electrons in the wire.The density of copper is 9000kgm^(-3) .

The free electrons of a copper wire of cross-sectional area 10^(-6) m^(2) acquire a drift velocity of 10^(-4) m//s when a certain potential difference is applied across the wire. Find the current flowing in the wire if the density of free electrons in copper is 8.5xx10^(28) "electrons"//m^(3) .

There is a current of 40 A in a wire 10^(-6)m^(2) area of cross-section. If the number of free electrons per cubic metre is 10^(29) , then the drift velocity is :

A copper wire of length 2m and area of cross-section 1.7 xx 10^(-6)m^(2) has a resistance of 2 xx 10^(-2) ohms. Calculate the resistivity of copper.