Analog Electronics
Which of the following statements is false?

All of these
Push pull signals are equal and opposite in phase
Class AB operation cannot be used for a push pull audio power output phase
A push pull output transformer has a centre-tapped primary

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Analog Electronics
In an OP-amp differentiator

The amplitude of output is proportional to input
Polarity of input and output is the same
The amplitude of output is proportional to rate of change of input
Output occurs when input is finite and constant

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Analog Electronics
The magnitude of electric current ICBO

  depends largely upon the emitter doping.
  increases with the increase in temperature.
  is generally greater in silicon than in germanium transistor.
  depends largely upon emitter-base junction base potential.

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