McqMate
| Q. |
Population inversion is obtained at a p-n junction by |
| A. | heavy doping of p-type material |
| B. | heavy doping of n-type material |
| C. | light doping of p-type material |
| D. | heavy doping of both p-type and n-type material |
| Answer» D. heavy doping of both p-type and n-type material | |
| Explanation: population inversion at p-n junction is obtained by heavy doping of both p-type and n-type material. heavy p-type doping with acceptor impurities causes a lowering of the fermi-level between the filled and empty states into the valence band. | |
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