The ratio of the concentration of electrons to that of holes in a semiconductor is 7 5 and the ratio of currents is 7 4 . Then, the ratio of their drift velocities is

Question

The ratio of the concentration of electrons to that of holes in a semiconductor is 7 5 and the ratio of currents is 7 4 . Then, the ratio of their drift velocities is, 4 7, 4 5, 5 8, 5 4

MARKS App · Accepted Answer

As I = n e A v d ⇒ I e I h = e n e A v e e n h A v h = n e v e n h v h ⇒ v e v h = I e I h × n h n e = 7 4 × 5 7 = 5 4

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