A copper wire has a resistance of `10 Omega ` and an area of cross-section `1 mm^(2)`. A potential difference of 10 V exists across the wire. Calculate the drift speed of electrons if the number of electrons per cubic metre in copper is `8xx10^(28)` electrons.

A current of 1.0 A exists in a copper wore of cross-section 1.0mm^(2) . Assuming one free electron per atom calculate the drift speed of the free electrons in the wire. The density of copper is 9000kg m^(-3) .

A potential difference of 10 V is applied across a conductor of resistance 1 k Omega . Find the number of electrons flowing through the conductor in 5 minutes.

A uniform copper wire having a cross sectional area of 1 mm^(2) carries a current of 5 A. Calculate the drift speed of free electrons in it. (Free electron number of density of copper =2 times 10^(28)//m^(3) .)

The density of copper is 9xx10^3 kg m^(-3) and its atomic mass is 63.5 u. Each copper atom provides one free electron. Estimate the number of free electrons per cubic metre in copper.

An aluminium wire of diameter 0.24 cm is connected in series to a copper wire of diameter 0.16 cm. The wires carry an electric current of 10 ampere. Find (i) current-density in the aluminium wire (ii) drift velocity of electrons in the copper wire. Given : Number of electrons per cubic metre volume of copper =8.4xx10^(28) .

A current of 1.34A exists in a copper wire of cross-section 1.0mm^(2) . Assuming eac copper atom contributes one free eectron. Calculate the drift speed of the free electrons in the wire. The density of copper is 8990 kg// m^(3) and atom ic mass=63.50.

A potential difference of 5V is applied across a conductor of length 10 cm. IF drift of electron is 2.5 xx 10^(-4) m//s , then electron mobility in SI unit is

A copper wire has a square cross-section, 2.0 mm on a side. It carries a current of 8 A and the density of free electrons is 8 xx 10^(28)m^(-3) . The drift speed of electrons is equal to

The drift speed of electrons in copper wire of diameter and length l is v . If the potential difference across the wire is doubled, then the new drift speed becomes

Find the current flowing through a copper wire of length 0.2m, area of cross-section 1 mm^(2) , when connected to a battery of 4 V. Given that electron mobility =4.5xx10^(-6) m^(2)V^(-1) s^(-1) and charge on electron =1.6xx10^(-19)C . The number density of electron in copper is 8.5 xx10^(28) m^(-3) .