What is the mean time between collisions in `10^(-14)` seconds for electrons in copper? Use electron density of copper is `n_(e)=8.5times10^(28)` `m^(-3)` and the measured conductivity `sigma=6.0times10^(7)Omega^(-1)m^(-1)`

Find the relaxation time for free electrons in copper, if the density of mobile electrons in copper, if the density of mobile electrons is 8.4 xx10^(28) m^(-3) . The resistivity of copper at room temperature is 1.7xx10^(-8)Omega m . Given : mass of electron =9.11 xx10^(-31) kg and charge on electron =1.6xx10^(-19)C .

A copper wire fo cross-sectional area 3.00xx10^(-6) m^2 carries a current 10.0A. a. Find the drift speed of the electrons in the wire. Assume that each copper atom contributes one free electron to the body of material. b. Find the average time between collisions for electrons in the copper at 20^@C. The density of copper si 8.95 gcm^(-1) , molar mass of copper is 63.5 gmol^(-1) , Avogadro number is 6.02x10^(23) electrons per mol and resistivity of copper is 1.7 xx10^(-8) Omegam.

In conductor, if the number of conduction electrons per unit volume is 8.5xx10^(28) m^(-3) and mean free time is 25 fs (femto seconds), it's approximate resistivity is : (m_(e)=9.1xx10^(-31) kg)

A straight copper-wire of length 1 = 1000 m and corss-sectional area A = 1.0 m m^(2) carries a current i=4.5A. The sum of electric forces acting on all free electrons in the given wire is M xx 10^(6)N . Find M. Free electron density and resistivity of copper are 8.5 xx 10^(28)//m^(3) and 1.7 xx 10^(-8)Omega .m respectively.

A current of 1.0 ampere is flowing through a copper wire of length 0.1 metre and cross-section 1.0xx10^(-6) m^(2) . (i) If the specific resistance of copper be 1.7xx10^(-8) Omega m , calculate the potential difference across the ends of the wire. (ii) Determine current density in the wire. (iii) If there be one free electron per atom in copper, then determine the drift velocity of electrons. Given : density of copper =8.9xx10^(3) kg m^(-3) , atomic weight =63.5, N=6.02xx10^(26) per kg-atom.

When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5 xx 10^(-4) ms ^(-1) . If the electron density in the wire is 8 xx 10^(28) m^(-3) , the resistivity of the material is close to :

A current of 10 A is maintained in a conductor of cross-section 1 cm^(2) . If the free electron density in the conductor is 9 xx 10^(28) m^(-3) , then drift velocity of free electrons is

A current of 10 A is mainatained in a conductor of cross - section 1 cm^(2) . If the free electron density in the conductor is 9 xx 10^(28) m^(-3) , then drift velocity of free electrons is .

A small insect crawls in the direction of electron drift along bare copper wire that carries a current of 2.56A. It travels with the drift speed of the electron in the wire of uniform cross-section area 1mm^2 Number of free electrons for copper = 8 times 10^28// cc and resistivity of copper = 1.6 times 10^-8 Omega m How much time would the insect take to crawl 1.0 cm if it crawls at the drift speed of the electron in the wire?

Find the average drift speed of free electrons in a copper wire of area of cross-section 10^(-7) m^(2) carrying current of 1.5 A and having free electron density 8.5 xx 10^(28) m^(-3)