Analog Electronics
A common - mode signal is applied to

  the non - inverting input.
  the top of the tail resistor.
  the inverting input.
  both inputs.

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Analog Electronics
In all base driver amplifiers

ac collector voltage is in phase with ac base voltage
None of these
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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Analog Electronics
A working diode must have

 High resistance when forward or reverse biased
 Low resistance when forward or reverse biased
 High resistance when forward biased, while low resistance when reverse bias
 Low resistance when forward biased, while high resistance when reverse bias

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