Answer all the items. Thanks! MULTIPLE CHOICE: Put the letter of the best answer on the space given.1. What does the abbreviation "LED" stand for?a. Light Emitting Diodeb. Low Emission Diodec. Liquid Emission Detectord. Long Echo Delay2. What is the most useful characteristic of a Zener diode?a. A constant current drop under conditions of varying voltageb. A negative resistance regionc. A constant voltage drop under conditions of varying currentd. An internal capacitance that varies with the applied voltage3. Which of the following devices or circuits changes an alternating current into a varyingdirect current signal?a. Transformerb. Amplifierc. Reflectord. Rectifier4. At room temperature, the current in an intrinsic semiconductor is due to:а. Holesb. Electronsc. Ionsd. Holes and electrons5. When a voltage is applied to a semiconductor crystal, then the free electrons will flow:a. Towards positive terminalb. Towards negative terminalc. Either towards positive terminal or negative terminald. Towards positive terminal for 1 ms and towards negative terminal for the next 1 ms6. The number of doped regions in PIN diode is:а. 1b. 3с. 2d. 1 or 27. A silicon (PN) junction at a temperature of 20°C has a reverse saturation current of 10pico ampere. The reverse saturation current at 40°C for the same bias is approximately:а. 30 рАb. 40 pAс. 50 рАd. 60 pA

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1. What does the abbreviation "LED" stand for? a. Light Emitting Diode b. Low Emission Diode c. Liquid Emission Detector d. Long Echo Delay 2. What is the most useful characteristic of a Zener diode? a. A constant current drop under conditions of varying voltage b. A negative resistance region c. A constant voltage drop under conditions of varying current d. An internal capacitance that varies with the applied voltage 3. Which of the following devices or circuits changes an alternating current into a varying direct current signal? a. Transformer b. Amplifier c. Reflector d. Rectifier

1. What does the abbreviation "LED" stand for? a. Light Emitting Diode b. Low Emission Diode c. Liquid Emission Detector d. Long Echo Delay 2. What is the most useful characteristic of a Zener diode? a. A constant current drop under conditions of varying voltage b. A negative resistance region c. A constant voltage drop under conditions of varying current d. An internal capacitance that varies with the applied voltage 3. Which of the following devices or circuits changes an alternating current into a varying direct current signal? a. Transformer b. Amplifier c. Reflector d. Rectifier

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter59: Motor Startup And Troubleshooting Basics

Section: Chapter Questions

Problem 12SQ: How is a solid-state diode tested? Explain.

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