For conduction electrons in copper at room temperature, how does the drift speed typically compare with the random thermal speed?

1. The thermal speed of copper atoms at 300 K is about $2 \times 10^{2}\ \text{m/s}$. 2. The drift speed found for a few-ampere current is about $10^{-3}\ \text{m/s}$. 3. The ratio $10^{-3}/10^{2} = 10^{-5}$, so drift speed is roughly $10^{-5}$ times thermal speed. 4. So C is correct; B reverses the ratio and D confuses drift with field propagation. _Source: NCERT Class 12 Physics Ch 3 "Current Electricity", p.6_