CUET and UG exam KEAM Engineering Mock Test Series 2025 Physics Current, Resistance and Electricity Drift of Electrons and the Origin of Resistivity
Every atom makes one free electron in copper. If \(1.1\) ampere current is flowing in the wire of copper having 1mm diameter, then the drift velocity (approx) will be (density of copper = \(9 \times 10^3 \, \text{kg/m}^3\) and atomic weight of copper = \(63\))
1
\(0.1 \, \text{mm/s}\)
2
\(0.2 \, \text{mm/s}\)
3
\(0.3 \, \text{mm/s}\)
4
\(0.2 \, \text{cm/s}\)
5
\(0.02 \, \text{cm/s}\)