What is the definition of alternating current?

What will be an ideal response?


Alternating current is a current that changes continuously with time. It rises from zero to a maximum value in one direction and decreases back to zero. It then rises to the same maximum value in the opposite direction and again decreases to zero. These values are repeated again and again at equal intervals of time.

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A pale yellow element occurring widely in nature is:

a. iron c. sulfur b. phosphorus d. antimony

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Most waterfowl select a mate _____

a. immediately after hatching b. before leaving the summer grounds c. while still on wintering grounds d. while nesting

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The temperature in a furnace equipment room is 65°F. Flue gas temperature is 375°F. What is the net stack

temperature? a. 65°F b. 310°F c. 375°F d. 440°F

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While we want to keep all ____ moisture out of our buildings, the proper level of water vapor helps keep a house comfortable.

A. latent B. external C. bulk D. accumulated

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