In the figure provided a wire consists of two segments made from the same material but with different cross sectional areas such that A2𝐴2 = 2 A1𝐴1. Which of the following is true about the strength of the electron drift velocities in the two segments?

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:

The drift velocity of electrons for a conductor connected in an electrical circuit is Vd. The conductor in now replaced by another conductor with same material and same length but double the area of cross section. The applied voltage remains same. The new drift velocity of electrons will be

The ratio of drift velocities in the given two conductors of same materials A & B 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

Suppose a electrical circuit uses 18 gauge wire and the drift velocity of electron through it wasvd = 0.15mm/s . Now the wire has been replaced by a 12 gauge copper wire which has twice thediameter of 18-gauge wire. If the current remains the same, what effect would this have on themagnitude of the drift velocity vdi) none— vd would be unchanged;ii) vd would be twice as great;iii) vd would be four times greater;iv) vd would be half as great;v) vd would be one-fourth as great.