JEE Main 202126 AugustMorning Shift
- Exam
- JEE Main
- Year
- 2021
- Date
- 26 August
- Shift
- Morning Shift
- Subject
- Physics
- Chapter
- Semiconductors
JEE Main 2021 · 26 August · Morning Shift · Physics · Semiconductors
Statement I: By doping silicon semiconductors with pentavalent...
Statement I: By doping silicon semiconductors with pentavalent material, the electrons density increases.
Statement II: The type of semiconductor has a net negative charge.
In the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth Statement I and Statement II are false.
- BStatement I is true but Statement II is false.
- CStatement I is false but Statement II is true.
- DBoth Statement I and Statement II are true.
Correct answer
B. Statement I is true but Statement II is false.
Step-by-step solution
Pentavalent material has excess free because we mix the impurities like phosphorus and arsenic having five electrons in the outermost shell. So density increases, but overall semiconductor is neutral. So we can say that Statement I is true but, Statement II is false.