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