Explain the phenomenon of the photoelectric effect.
What will be an ideal response?
When a semiconductor material absorbs sunlight, the solar energy knocks electrons loose from the atoms that make up the material. This phenomenon is called the ‘photoelectric effect.’ These free electrons flow into a circuit build into the solar cell and form an electric current. Only sunlight of certain wavelengths works efficiently to create electricity through the photoelectric effect. For this reason, PV systems can still produce electricity on cloudy days, but not as much as on a sunny day.
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Indicate whether the statement is true or false
Clams, mussels, oysters, and scallops fall into the ____________________ subcategory of shellfish
Fill in the blank(s) with correct word
White, or natural gray-colored insulation is ____.
A. unrestricted in usage B. restricted from usage on any grounding conductor C. restricted from usage on any grounded conductor D. restricted from usage on any ungrounded conductor
Which of the following pressure values are FMVSS-121 compliant for governor cut-out and cut-in pressures?
A. cut-out at 135 psi and cut-in at 115 psi B. cut-out at 135 psi and cut-in at 90 psi C. cut-out at 110 psi and cut-in at 80 psi D. cut-out at 115 psi and cut-in at 85 psi