Analog Electronics
With both bases grounded, the only offset that produces an error is the

  input offset voltage.
  β.
  input offset current.
  input bias current.

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Analog Electronics
In an OP-amp differentiator

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

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Analog Electronics
The ICBO is the electric current that flows when some DC voltage is applied

  in the reverse direction to the collector junction with emitter open.
  in the forward direction to the emitter junction with collector open.
  in the reverse direction to the emitter junction with collector open.
  in the forward direction to the collector junction with emitter open.

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