A current of 1 A flows through a wire of length 0.24m and area of cross-section `1.2mm^2`, when it is conneted to a battery of 3V. Find the number density of free electrons in the wire, if the electron mobility is `4.8 xx 10^-6 m^2 V^-1s^-1`, given that charge on electron `= 1.6 xx 10^-19C`

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.

A current of 1.8 A flows through a wire of cross-sectional area 0.5 mm^(2) ? Find the current density in the wire. If the number density of conduction electrons in the wire is 8.8 xx 10^(28) m^(-3) , find the drift speed of electrons.

A potential difference of 6 V is applied across a conductor of length 0.12 m. Calculate the drift velcoity of electrons, if the electron mobility is 5.6 xx 10^-6 m^2V^-1s^-1 .

Find the resistance of a nichrome wire of length 2m and area of cross-section 2mm^(2) rho_(nichrome)=100xx10^-6Ohm-m .

A current of 2.4 A flows through a wire of cross-sectional area 1.5 mm^2 . Find the current density in the wire. If the wire contains 8 xx 10^28m^-3 elecrtrons per unit volume calculate the average relaxation on time. Given that charge on electron = 1.6 xx 10^-19C and mass of electron =9.1 xx 10^-31 kg.

A current of 5A is passing through a metallic wire of area of cross-section 4xx10^-6m^2 , If the density of charge carriers of the wire is 5xx10^26m^−3 find the drift velocity of electrons.

A current of 10A is maintained in a conductor of cross-section 10^-4m^2 . If the number density of free electrons be 9 xx 10^28 m^-3 , calcualte the drift velocity of free electrons. Given, charge on electron, e = 1.6 xx 10^-19C

Find the resistance of a nichrome wire of length 1m and area of cross-section 4mm^(2) . rho(nichrome)= 100xx10^(-6)Ohm-m .

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 .