Analog Electronics
The negative part of the output signal in a transistor circuit starts clipping if the Q point of the circuit moves

  toward the saturation point.
None of these
  toward the cutoff point.
  toward the center of the load line.

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Analog Electronics
In an OP-amp differentiator

The amplitude of output is proportional to input
Polarity of input and output is the same
Output occurs when input is finite and constant
The amplitude of output is proportional to rate of change of input

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