A Si bar 0.1 cm long and 100 μm² in cross-sectional area is doped with 2x10^17 cmâ»Â³ antimony. (a) Find the current at 300K with 10V applied. Repeat for 1 μm long Si bar. (b) How long does an average electron take to drift 1 m in pure Si at μ = 50 V/cm? Repeat for 5x10^5 V/cm.