The number density of conduction electron in copper is `8.5xx10^28(m^-3)` and the mean free time between two collision is `2.5xx10^-14`s. What is the conductivity of copper ?

The number density of free electrons in a copper conductor is 8.5xx10^28m^(-3) . How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is 2.0xx10^(-6)m^2 and it is carrying a current of 3.0A.

The coefficient of linear equation of copper is 17times10^-6//^@C and its temperature coefficient of resistance is 42.5times 10^(-4^@)C^-1 . IF the resistivity of copper at 0^@C be 1.55 times 10^-6 Omega cm. then what will be its resistivity at 100^@C ?

A semiconductor has the eIectron concentration 0.45 xx 10^(12) "m"^(-3) and the hoIe concentration 5 xx 10^(20)m^(-3) . CaIcuIate the conductivity of the mate- riaI of this semiconductor. Given, Electron mobiIity =0.135 "m"^(2). V^(-1).s^(-1) and hoIe mobiIity =0.048 "m"^(2). V^(-1). s^(-1) .

Estimate the average drilft velocity of conduction electrons in a copper wire of cross-section 20xx10^-3 cm^2 carrying a current of 20A. Assume the density of conduction electrons to be 9X10^28 m^3 .

0.1 M solution is present in a conductivity cell wich electrode of 100cm^(2) area placed 1 cm apart and resistance observed is 5xx10^(3) ohm. What is the molar conductivity of this solution?

Estimate the average drift speed of conduction electrons in a copper wire of cross sectional area 1.0 times 10^-7 m^2 carrying a current of 1.5 A.Assume that the number density of conduction electrons is 9 times 10^25 m^-3 charge of an electron = -1.6 times 10^-19C .

Estimate the average drift velocity of conduction electron of a copper wire of cross section 2.0 times 10^-3 cm^2 carrying a current of 2.0A.Assume the density of conduction electrons to be 9 times 10^28 m^-3 .

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectioal area 1.0xx10^(-7)m^2 carrying a current of 1.5 A. Assume that each copper atom contributes roughly one conduction electron. The density of copper is 9.0xx 10^3 kg//m^3 and its atomic mass is 63.5.

Estimate the average drift speed of conduction electrons in a copper wire of across sectional area 1.0 times 10^-7 m^2 carrying a current of 1.5A.Assume the density of conduction electrons to be 9 times 10^28 m^-3 .