MHT CET 202625 AprilMorning Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 25 April
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Semiconductors
MHT CET 2026 · 25 April · Morning Shift · Physics · Semiconductors
Which of the following is true for a p-type semiconductor?
Which of the following is true for a p-type semiconductor?
Options
- AThe impurity level lies just above the valence band.
- BThe impurity level is just below the conduction band.
- CThe impurity level is near the conduction band.
- DThe majority carriers are electrons.
Correct answer
A. The impurity level lies just above the valence band.
Step-by-step solution
In a p-type semiconductor, trivalent impurity atoms (such as boron, aluminum, or gallium) are added to an intrinsic semiconductor.
These impurity atoms create an acceptor energy level which lies just above the valence band.
Electrons from the valence band can easily transition to this acceptor level at room temperature, leaving behind holes in the valence band. Thus, holes become the majority charge carriers.
Therefore, the impurity level lies just above the valence band.
Answer: The impurity level lies just above the valence band.
These impurity atoms create an acceptor energy level which lies just above the valence band.
Electrons from the valence band can easily transition to this acceptor level at room temperature, leaving behind holes in the valence band. Thus, holes become the majority charge carriers.
Therefore, the impurity level lies just above the valence band.
Answer: The impurity level lies just above the valence band.