here is a current of 20 amperes in a copper wire of square metre area of cross-section. If the number of free electrons per cubic metre is then the drift velocity is:

conductor of copper, the density of free electons is 5×10^23 electrons per unit volume, carrying current of intenisty 1.6A if the cross-sectional area of a conductor is 4mm^2 so the drift velocity of electrons is

Copper contains 8.4×1028 free electrons/m3 . A copper wire of cross-sectional area 7.4×10−7 m 2carries a current of 1 A. The electron drift speed is approximately:A. 3 × 108 m/sB. 103 m/sC. 1 m/sD. 10−4 m/sE. 10−23 m/s

At room temperature, copper has free electron density of 8.4 × 1028 m−3. The electron drift velocity in a copper conductor of cross-sectional area 10−6 m2 and carrying a current of 5.4 A, will be -

An 18 gauge copper wire with a diameter of 1.02 mm carries a constant current of 1.65 A to a 200 W lamp. The free electron density in the wire is 8.5 X 1028 per cubic meter. Find (a) the current density and (b) the drift speed.

What is the applied electric field that will impose a drift velocity equal to 10% of themean speed, u = 1.2 X 106 m/s of the conduction electrons in copper? The driftmobility of the electron is 32 cm2/Vs.