Analog Electronics
A transistor series voltage regulator is called emitter follower regulator because the emitter of the pass transistor follows the ________________________ voltage.

  input.
  base.
  output.
  collector.

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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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