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Analog Electronics

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

  α - 1.
  α.
  β + 1.
  β.

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Analog Electronics
The common - mode rejection ratio is

  very low.
  equal to the common-mode voltage gain.
  equal to the voltage gain.
  as high as possible.

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Analog Electronics
If=0.98, Ico=6µA and Iβ=100µA for a transistor,then the value of Ic will be

3.2mA
4.6mA
2.3mA
5.2mA

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Analog Electronics
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are

fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz
fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz
fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz
fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz

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Analog Electronics
Conduction electrons have more mobility than holes because they

 need less energy to move them
 are free
None of these
 have negative charge

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Analog Electronics
The majority carriers in the emitter of a PNP transistor are

 holes.
 trivalent atoms.
 free electrons.
 pentavalent atoms.

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