Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 20, Problem 10RQ
What determines the amount of current a solar cell can produce?
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Who invented sunflower solar panels and when?
One of the advantages of
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uses global radiation
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How is the electrical load changed in the experiment?
O a. By covering the solar with your hand
O b. By changing the angle of the solar cell
O c. By changing the resistance value of the variable resistor
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O d. By adding or removing lamps
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Chapter 20 Solutions
Understanding Motor Controls
Ch. 20 - List the three major categories of...Ch. 20 - In which category does the solar cell belong?
Ch. 20 - In which category do phototransistors and...Ch. 20 - Prob. 4RQCh. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - What is the advantage of a photodetector that uses...Ch. 20 - An object is to be detected by reflecting light...Ch. 20 - How much voltage is produced by a silicon solar...Ch. 20 - What determines the amount of current a solar cell...
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- What is the difference between led beam angle in air and underwater?arrow_forward____________________type solar collectors are used mainly in thermo electric power generation plants. Select one: Flat plate None of these Non-concentrating Concentratingarrow_forwardWhich of the following is(are) true regarding the solar gain on windows? A. The solar gain due to north-facing windows is greater than the solar gain due to south-facing windows. B. The solar gain due to east-facing windows is greater than the solar gain due to west-facing windows. C. The solar gain due to west-facing windows is greaterthan the solar gain due to east-facing windows. D. The solar gain due to south-facing windows is greaterthan the solar gain due to north-facing windows.arrow_forward
- 26 Concerning the photoelectric effect, which of the following is not true? * For most metals, ultraviolet light is needed for the photoelectric effect to occur. Because a faint light contains very little energy, it takes as few minutes before electrons are emitted from the metal it is shining upon. O A bright light causes more electrons to be emitted than a faint light O Higher frequency light emits electrons with higher kinetic energies.arrow_forwardWhat is the current flows through each of the following lightbulbs: 60W, 100 W. Each light is connected to a 120-V linearrow_forwardWhy are good electrical conductors almost the same as good heat conductors.arrow_forward
- Why wires are covered by rubber or plastic covering?arrow_forward34- Energies of the electromagnetic radiation in the visible range of light (white light) vary between 1.8 eV (red light) and 3.1 eV (blue light). If white light impinges (hit) on the surface of a non-conducting material having Egap-2.5 eV, which one of the following is observed? All the electromagnetic radiation is absorbed by the material. A- Partial absorption of visible light happens, and the material is colored. All the electromagnetic radiation is reflected on the surface of the material. None of the electromagnetic radiation is absorbed, and the material is transparent. B- C- D- E- None of the choices above are correct.arrow_forwardWhat is the advantage of a photodetector that uses a reflector to operate?arrow_forward
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