The drift velocity of electrons in a wire is measured to be 2.0×10−4m s−1 when the electric field inside the wire is 0.25V m−1. Calculate the mobility of electrons in the wire.
a) 8.0×10−5m2V−1s−1
b) 8.0×10−4m2V−1s−1
c) 5.0×10−3m2V−1s−1
d) 5.0×10−5m2V−1s−1