| 1. | The term negative temperature coefficient is just another way of saying its resistance to electrical current flow decreases as temperature increases. |
| | True |
| | False |
| 2. | Selenium has a property to convert dc into ac. |
| | True |
| | False |
| 3. | Maximum _____________is the maximum current permitted to flow in the forward direction in the form of nonrecurring pulses. |
| | Surge current |
| | Forward current |
| 4. | __________ bonding is the sharing of valence electrons between two or more atoms. |
| | Covalent |
| | Ionic |
| 5. | Current flow in an N-type material is similar to conduction in a copper wire. |
| | True |
| | False |
| 6. | A _______________ is a chemical combination of two or more elements. |
| | Molecule |
| | Atom |
| | Compound |
| | None of the above |
| 7. | _____________is an external voltage that is applied to a PN junction to reduce its barrier and, therefore, aid current flow through the junction. |
| | Reverse bias |
| | Forward bias |
| 8. | Diode ratings are not the limiting value of operating conditions of a diode. |
| | True |
| | False |
| 9. | A ________is a three or more element solid-state device that amplifies by controlling the flow of current carriers through its semiconductor materials. |
| | Diode |
| | Rectifier |
| | Transistor |
| | None of the above |
| 10. | The proper biasing of a transistor enables the transistor to be used as an amplifier. |
| | True |
| | False |
| 11. | The_______________________ is mainly used for impedance matching, since it has a low input resistance and a high output resistance.. |
| | Common emitter configuration |
| | Common ground configuration |
| | Common base configuration |
| | None of the above |
| 12. | The current gains for the three transistor configurations (CB, CE, and CC) are alpha, beta and gamma. |
| | True |
| | False |
| 13. | The______________ is a three-terminal, solid-state device with only one PN junction. |
| | Uni-junction transistor |
| | Mosfet |
| 14. | The SILICON CONTROLLED RECTIFIER (SCR) is a four-element, solid-state device that does not combine characteristics of both diodes and transistors. |
| | True |
| | False |
| 15. | The _________diode is a heavily doped PN junction that exhibits negative resistance over part of its range of operation. |
| | Zener |
| | Tunnel |
| 16. | HALF-WAVE rectifiers give an output on only one half cycle of the input ac. |
| | True |
| | False |
| 17. | Bridge rectifiers are full-wave rectifiers that do not use a center-tapped, high-voltage secondary. |
| | True |
| | False |
| 18. | Inductor filters does not use an inductor called a choke to filter the pulsating dc input. Because of the impedance offered to circuit current, the output of the filter is at lower amplitude than the input. |
| | True |
| | False |
| 19. | ______________________ uses a variable resistance placed in parallel with the load. |
| | Series regulator |
| | Shunt regulator |
| 20. | A positive electrode of an electrochemical device (such as a primary or secondary electric cell) toward which the negative ions are drawn is a _____________________. |
| | Cathode |
| | Anode |
|
