Q. 144.0( 14 Votes )

Estimate the aver

Answer :

Given: -


Cross-section area, A = 1.0 × 10−7 m2


Current, I = 1.5 A


Density of electrons, n = 9 × 1028 m−3.


Formula: -


The drift speed of the electrons is given by,



Where, vd is the drift speed of the electrons, I is the current, A is the area of cross section, e is the electronic charge and n is the density of electrons,


Calculations: -



vd = 0.104 × 10-2 m/s


vd = 1.04 × 10-3 m/s or 1.04 mm/s


Conclusion: -


The average drift speed of conduction electrons is 1.04 mm/s.


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