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Analog Electronics

Analog Electronics
The DC electric current gain in common collector configuration is given by

  β + 1.
  α.
  α - 1.
  β.

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Analog Electronics
Which is the factor on which total number of electrons in an atom depends ?

None of these
 atomic number
 atomic weight
 atomic size

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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
The Barkhausen criterion for an oscillator

 Both A and C
 Loop gain should be unity
 The phase of a feedback signal with respect to input should be 0° or 360°
 Loop gain should be less than unity

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Analog Electronics
In a common emitter, unbypassed resister provides

negative voltage feedback
current series feedback
positive current feedback
voltage shunt feedback

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Analog Electronics
A zener diode voltage regulator has load requirement of 12 V and 2 Amp. The zener diode's minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is maximum efficiency of circuit?

 66.3 %.
 52.8 %.
 34.3 %.
 45.5 %.

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