A copper wire of length 1 {m} and uniform cross-sectional area 5 \\times10^{-7} {m}^{2} carries a current of 1 {\A}. Assuming that, there are 8 \\times10^{28} free electrons per {m}^{3} in copper, how long will an electron take to drift from one end of the wire to the other?

KCET 2021 Physics Solved Paper

Question : 52 of 60

Marks: +1, -0

A copper wire of length 1m and uniform cross-sectional area 5×10−7m2 carries a current of 1A. Assuming that, there are 8×1028 free electrons per m3 in copper, how long will an electron take to drift from one end of the wire to the other?

0.8×103s
1.6×103s
3.2×103s
64×103s

Validate

Go to Question:

Prev Question

Next Question