| 1. Zener diodes are designed to operate in |
| 2. A diode behaves like a non-return valve. |
| 3. Three phase rectification provides smoother output than single phase? |
| 4. Boron is an acceptor element. |
| 5. In a transistor the collector junction is more heavily doped than the emitter junction |
| 6. About???? volts is required to overcome the potential barrier is silicon diode. |
| 7. In an n-p-n transistor action, all the electrons from the emitter do not recombine with hole at the base. |
| 8. For proper transistor action, the base-emitter junction must be forward biased, and the collector-emitter junction must be reverse biased for a common emitter configuration. |
| 9. As a switch that is OFF the transistor operates in the??????????region. |
| 10. The electric field produced due to recombination of holes and electrons at a p-n junction creates the
|
| 11. Materials whose electrical properties lie between those of conductors and insulators are known as |
| 12. A semiconductor doped to have electrons as majority charge carriers is ???(material). |
| 13. Phosphorous is a donor element. |
| 14. For three phase ac rectification how many diodes are required? |
| 15. The optimum point on a transistor load line is called the |
| 16. Which of the following can be used for voltage stabilization?
|
| 17. In removing ac ripples with a capacitor, it must be connected in parallel with the load |
| 18. As an amplifier, a transistor operates in the??????????????? region |
| 19. The emitter current is the sum of base current and collector current. |
| 20. Apart from a capacitor,??. can also be used remove ac ripples. |
| 21. In conductors, the valence and conduction bands overlap |
| 22. The condition for maximum power transfer is that the load resistance must be equal to
|
| 23. A semiconductor in its pure state is said to be |
| 24. ??is responsible for partial conduction in semiconductor. |
| 25. The static output resistance of a transistor is given by |
| 26. In full wave rectification with a center-tap transformer, how many diodes are required? |
| 27. The static current gain of a transistor is given by |
| 28. The shells of an atom represent various energy levels |
| 29. The purpose of using a capacitor (usually ceramic) in a power supply is for
|
| 30. During partial conduction in a semiconductor ?????? move relative to electrons. |
| 31. As a switch that is ON the transistor operates in the?????region |
| 32. Doping is the process of introducing????.into a semiconductor material. |
| 33. As a switch the transistor operates in how many regions? |
| 34. A semiconductor doped to have holes as majority charge carriers is a ???(material). |
| 35. The process of removing ac ripples from a rectified ac power is called |
| 36. The ninth shell of an atom is capable of containing ??????. electrons. |
| 37. The static input resistance of a transistor is given by |
| 38. About ???? volts is required to overcome the potential barrier is germanium diode. |
| 39. One purpose of using a capacity (usually electrolytic) in a power supply is for |
| 40. A p-type material joined to an n-type material forms an electronic component called |
