Each junction of a transistor exhibits a ____ resistance when it is forward biased and a ____ resistance when reverse biased.

A. low, high
B. high, low
C. negative, positive
D. positive, negative


Answer: A

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PTAC and window unit air conditioners often use rotary compressors, which are effective but susceptible to failure due to high head pressure. What is the most common cause of high head pressure in these units?

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Potentiometers can convert mechanical motion into electrical variations.

Answer the following statement true (T) or false (F)

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