wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

In a semiconductor, 2/3rd of the total current is carried by electrons and remaining 1/3rd by the holes. If at this temperature, the drift velocity of electrons is 3 times that of holes, the ratio of number density of electrons to that of holes is

A
32
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
23
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
53
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
33
No worries! We‘ve got your back. Try BYJU‘S free classes today!
E
13
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 23
Given, Ie=23I
Ih=13I and ve=3vh
We know that,
Electron current, Ie=neeAve....(i)
Hole current, Ih=nheAvh....(ii)
On dividing Eq. (i) and (ii), we get
IeIh=nevenhvh
nenh=IeIh×vhve=23I13I×vh3vh
nenh=23.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Intrinsic Semiconductors
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon