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)`.

An aluminium wire of diameter 2.5 mm is connectedf in series with a copper wire of diameter1.6 mm. A current of 2.0 A is passed through them. Find (a) current density in aluminium wire, (b) drift velocity of electrons in copper wire. Given the number density of conduction electrons in copper is 10^(29) m^(-3) .

A copper wire of diameter 0.16 cm is connected in series to an aluminium wire of diameter 0.25 cm. A current of 10 A is passed through them. Find (i) current density in the copper wire (ii) drift velocity of free electrons in the aluminium wire. The number of free electrons per unit volume of aluminium wire is 10^(29) m^(-3) .

A copper wire of diameter 0.16 cm connected in series to an aluminum wire of diameter 0.25cm . A current of 10 ampere is diameter through them Find (a) current density in copper wire (b) drift velocity of electron in the aluminium wire .The number of free electrons per unit volume of aluminium wire is 10^(29)m^(-3)

A copper sphere of radius 3 cm is beaten and drawn into a wire of diameter 0.2 cm. The length of the wire is :

A copper sphere of diameter 18cm is drawn into a wire of diameter 4mm. Find the length of the wire.

A copper sphere of diameter 36 cm is drawn into a wire of diameter 4 mm. Find the length of the wire.

A wire of diameter 0.02 metre contains 1028 free electrons per cubic metre. For an electrical current of 100 A , the drift velocity of the free electrons in the wire is nearly