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Analog Electronics

Analog Electronics
An Op-Amp comparator circuit employs

 both B and C.
 no feedback.
 +ve feedback.
 -ve feedback.

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Analog Electronics
The transition capacitance of a reverse biased pn junction having uniform doping on both sides, varies with junction voltage ( VB ) as

  ( VB )2.
  1 / VB.
  ( VB )- 1 / 2.
  VB.

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Analog Electronics
Energy gap of semiconductor is approx

 0 eV.
 > 8 eV .
 1 eV.
 5 - 8 eV.

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Analog Electronics
The majority carrier in P-type extrinsic semiconductor material is

 Both Holes and Electrons
None of these
 Holes
 Electrons

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Analog Electronics
In CB configuration, the output V-I characteristics of a transistor are drawn by taking

  VCB versus IC for constant IE.
  VCB versus IB for constant IE.
  VCB versus IB for constant IE.
  VCE versus IC for constant IE.

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Analog Electronics
The current gain of a bipolar transistor drops at high frequencies because of

Transistor capacitances
The early effect
High current effects in the base
Parasitic inductive elements

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