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Analog Electronics

Analog Electronics
In a CB amplifier the maximum efficiency could be

99%
85%
25%
50%

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Analog Electronics
A semiconductor material is formed by

None of these
 Electrovalent bonds
 Covalent bonds
 Metallic bonds

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Analog Electronics
Which of the following is Pentavalent impurity?

 boron
 antimony
 indium
 gallium

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Analog Electronics
Single phase, 230 V, 1 KW heater is connected acrose single phase 230 V, 50 Hz supply through a diode. The power delivered to the heater element

 1000 W.
  500 W.
 100 W.
 None of above.

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Analog Electronics
In a common emitter, unbypassed resister provides

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

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Analog Electronics
What will happen if doping of an intrinsic semiconductor with pentavalent impurity atom ?

 Fermi level not change
None of these
 Fermi level fall
 Fermi level raises

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