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The contribution in the total current fl...

The contribution in the total current flowing through a semiconductor due to electrons and holes are `3/4` and `1/4` respectively. If the drift velocity of electrons is `5/2` times that of holes at this temperature, then the ratio of concentration of electrons and holes is

A

`6:5`

B

`5:6`

C

`3:2`

D

`2:3`

Text Solution

Verified by Experts

The correct Answer is:
A
Current `I="neAv"_(d)`
`(I_(e))/(I_(h))=(n_(e))/(n_(h))xx(v_(e))/(v_(h))implies(3//4)/(1//4)=(n_(e))/(n_(h))xx(5)/(2)`
implies `(n_(e))/(n_(h))=(6)/(5)`
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