Analog Electronics
A 741 C has

All of these
  an output impedance of 75 Ω.
  a voltage gain of 100,000.
  an input impedance of 2 MΩ.

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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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