Calculate the electric field in a copper wire of cross-sectional area`2.0mm^(2)` carrying a current of 1A .The resistivity of copper `=1.7xx10^(-8)(Omega)m`.

What length of a copper wire of cross-sectional area 0.01 mm^2 will be needed to prepare a resistance of 1 kOmega ? Resistivity of copper = 1.7 xx 10^(-8) Omega m .

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 2.5xx10^(-7)m_(2) carrying current of 1.8 A. Assume the density of conduction electrons to be 9xx 10^(26)m_(3) .

Calculate the resistance of an aluminium wire of length 50 cmand cross sectional area 2.0mm^(2) . The resistivity of aluminium is (rho)=2.6xx10^(-8)(Omega)m.

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 2.0 xx 10^(-7)m^(2) carrying a current of 3.0 A. Assume that each copper atom contributes roughly one conduction electron. The density of copper is 9.0 xx10^(3) kg//m^(3) , and its atomic mass is 63.5 u.

Estimate the average drift speed of conduction electrons in a copper wire of cross-sectional area 1.0xx10^(-7)m^(2) carrying a current of 1.5xx10^(-19) A. Assume the density of conduction electrons to be 9xx10^(28)m^(-3) .

(a) Estimate the average drift speed of conductin electrons in a copper wire of cross sectional 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 9.0xx10^3 kgm^(-3) and its atomic mass is 63.5 u. (b) Compare the drift speed obtained with the speed of propagation of electric field along the conductor, which causes the drift motion.

Estimate the average drift velocity of conduction electrons in a copper wire of cross-sectional area 2.5 xx 10^(-7) m^(2) , carrying a current of 2.7 A. Assume the density of conduction electrons to be 9 xx 10^(28) m^(-3) .

A copper wire of cross - sectional area 3.4 m m^(2) and length of the wire 400m, specific resistivity of copper is 1.7 xx 10^(-8)Omega-m . Then the resistance of the wire is

Find the resistance of a copper coil of total wire-length 10m and area of cross section 1.0mm^(2). What would be the resistance of a similar coil of aluminium? The resistivity of copper =1.7xx10^(-8)(Omega)m and that of aluminium 2.6xx10^(-8)(Omega).

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)