Question

The drift velocity of electrons in a silver wire with cross–sectional area 3.14×10⁻6m² carrying a current of 20A is to be calculated. Given: atomic weight of Ag =108, density of silver =10.5×10³kg m⁻3.

• A. \(2.798\times10^{-4}\,\text{m s}^{-1}\)
• B. \(67.98\times10^{-4}\,\text{m s}^{-1}\)
• C. \(0.67\times10^{-4}\,\text{m s}^{-1}\)
• D. 6.798×10⁻4m s⁻1

Hint:

Drift velocity is extremely small even for large currents.

Answer 1

The Correct Option is D