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Analog Electronics

Analog Electronics
What is mean by the outermost orbit of an atom ?

None of these
 Valence orbit
 Energy band
 Conduction band

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Analog Electronics
In a bipolar junction transistor the base region is made very thin so that

  base can be easily biased.
  recombination in base region is minimum.
  electric field gradient in base is high.
  base can be easily fabricated.

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Analog Electronics
Suppose the base resistor is open. The Q point will be

 in the middle of the load line.
  at the lower end of the load line.
 off the load line.
 at the upper end of the load line.

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Analog Electronics
The amount of time between the creation and disappearance of a free electrons is called

 drift velocity
 recombination
 bound electrons
 life time of the carriers

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Analog Electronics
Most of the electrons in the base of an NPN transistor do not recombine because they

 flow out of the base.
  have a long lifetime.
 must flow through the base.
 have a negative charge.

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Analog Electronics
The Barkhausen criterion for an oscillator

 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
 Both A and C

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