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

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

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Analog Electronics
In all base driver amplifiers

None of these
ac collector voltage is in phase with ac base voltage
ac collector voltage is 180° out of phase with ac base voltage
ac emitter voltage is 180° out of phase with ac base voltage

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