The number density of free electrons in a copper conductor estimated in Example 3.1 is `8.5 xx 10^28 m^-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 `2.0 xx 10^-6 m^2` and it is carrying a current of 3.0 A.

The number density of electron in copper is 8.5 xx10^(28)m^(-3) . Find the current flowing through a copper wire of length 20 cm, area of cross section 1 mm square,when connected to a battery of 3 V. Given the electron mobility = 4.5xx10^(-6)m^(2)V^(-1) s^(-1) and electron charge = 1.6 xx 10^(-19)C.

Find the resistance of a copper wire of length 1m and area of cross-section 2mm ^(2) .The specific resistance of copper= 1.7xx10^(-8)Ohm-m .

Calculate the conductance and conductivity of a wire of resistance 0.01Omega area of cross-section 10^-4m^2 and length 0.1 m.

The resistance of 0.05 M NaOH solution in a cell having length 5 cm area of cross section 10 cm2 is 5.55 xx 10^3 ohm. Calculate its molar conductance.

Given that resistivity of copper is 1.68 xx 10^-8Omega m. Calculate the amount of copper required to draw a wire 10 km long having resistane 10Omega . The density of copper is 8.9 xx 10^3 kg m^-3

Assuming that the charge of an electron is 1.6 xx 10^-19C , the number of electrons passing through a section of wire per second, when the wire carries a current of 1 A is

A wire carries a current of 1.2 A when a potential difference of 1.8 V is applied across it. What is its conductance? If the wire is of length 3 m and area of cross-section 5.4 xx 10^-6 m^2 calculate its conductivity.