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Analog Electronics

Analog Electronics
Which impurity is added into semiconductor to increase its conductivity ?

 intrinsic
None of these
 extrinsic
 doping

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Analog Electronics
The input stage of an op amp is usually a

  CE amplifier.
  differential amp.
  class B push-pull amplifier.
  swamped amplifier.

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Analog Electronics
Silicon has

 two valence electrons.
 four valence electrons.
 eight valence electrons.
 none of above.

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Analog Electronics
The forbidden energy gap between valance band and conduction band in semiconductor material is about

 1eV
None of these
 0 eV
 15 eV

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Analog Electronics
When there is no base current in a transistor switch, the output voltage from the transistor is

 low.
  high.
 unchanged.
 unknown.

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Analog Electronics
In the second approximation, the total voltage across the zener diode is the sum of the breakdown voltage and the voltage across the

  source.
  zener resistance.
  zener diode.
  series resistor.

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