Which of the following best describes the role of voltage in an electrical circuit?
A. Current.
B. Pressure.
C. Polarity.
D. Potential.
Answer: B
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Discuss the advantages and disadvantages of solar cells being made into other forms besides individual units combined into modules and arrays.
What will be an ideal response?
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Which of the following values is closest to a perfect vacuum?
a. 50 microns b. 500 microns c. 1,300 microns d. 25,000 microns
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In order to deliver different volumes of air to various areas in an occupied space, the blowers used on VAV systems must be able to modulate their openings to accommodate the changing needs of the system.
Answer the following statement true (T) or false (F)
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On a DC motor, the series field is typically labeled ____.
A. S1 and S2 B. F1 and F2 C. A1 and A2 D. T1 and T2
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