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The output of a NOT gate is HIGH when ________.

  • A.the input is LOW
  • B.the input is HIGH
  • C.power is applied to the gate's IC
  • D.power is removed from the gate's IC

Answer: A

Correct answer: the input is LOW

A NOT gate produces the complement of its input, so its output is HIGH exactly when the input is LOW. The presence of supply power is a precondition for the gate working at all, not a logical input.

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