Question

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

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

Hint:

Drift velocity is very small because: vd=(I)/(nqA) Large number density of electrons reduces vd.

Answer 1

The Correct Option is D