Answer :

**Given: -**

Cross-section area, A = 1.0 × 10^{−7} m^{2}

Current, I = 1.5 A

Density of electrons, n = 9 × 10^{28} m^{−3}.

**Formula: -**

The drift speed of the electrons is given by,

Where, v_{d} 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: -**

v_{d} = 0.104 × 10^{-2} m/s

v_{d} = 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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