Analog Electronics
The input voltage to an emitter follower is usually

 equal to the generator voltage.
 equal to the supply voltage.
 greater than the generator voltage.
  less than the generator voltage.

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Analog Electronics
In all base driver amplifiers

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

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