To a germanium sample, traces of gallium are added as an impurity. The resultant sample would behave like [2003]
A
a conductor
B
an 
type semiconductor
type semiconductor
C
a 
‐type semiconductor
‐type semiconductor
D
an insulator
Text Solution
Verified by ExpertsThe correct answer is:
C
When gallium is added to germanium all of the three valence electrons form covalent bonds with one each valence electron of the three nearest germanium atom while the valence electron of the fourth nearest germanium atom is not able to form bond. Thus, there is a deficiency of one electron. This is called hole. Such an impure germanium crystal is called 
− − type semiconductor.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The intrinsic semiconductor becomes an insulator at
Which gate is represented by the following truth table?
ABC001101011110
Current in the circuit will be [2001]
In a p‐n junction [2002]
For the given circuit of p‐n junction diode, which of the following statement is correct: [2002]
For a common base configuration of transistor , then maximum current gain in common emitter confi…