Question

Mean drift velocity of electron in a copper wire having cross-sectional area 5.0 × 10^-6 m² carrying current of 1 A and having number density 8.5 × 10 28 m³ is 

A. 0.015 mm s^-1 

B. 0.1 mm s^-1 

C. 0.5 mm s^-1 

D. 0.25 mm s^-1 

Answer 1

A. 0.015 mm s^-1