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Step 1 of 3 3.007P The drift velocity of electron is, = (1) The electric field E is, Substitute 3V for voltage V and 10 µm for length 10 µm 3V E = 0.3 V/µm Step 2 of 3 The electron mobility is 1350 cm²/V.s Substitute 1350 cm²/V.s for and 0.3 V/µm for E in equation (1) 405 cm = 10⁻² m µm = m Convert all units into meters to represent velocity in meter/second. =40,500 m/s Therefore, the drift velocity of the electrons is Step 3 of 3 The drift velocity of hole is, = (2) Substitute 480 cm²/V.s for and 0.3 for E in equation (2) 144 1 cm = 10⁻² m 1 µm = m Convert all units into meters to represent velocity in meter/second. =14,400 m/s Therefore, the drift velocity of hole is Hence, from the values of electron and hole drift velocities it is clear that the drift velocity of electrons is more than the drift velocity of holes because the mobility of electrons is more than the mobility of holes.