Analog Electronics
The biasing circuit that gives best stability to Q point is

  feedback resistor biasing .
  emitter resistor biasing.
  base resistance biasing.
  potential divider biasing.

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Analog Electronics
In all base driver amplifiers

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

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