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Analog Electronics

Analog Electronics
The input impedance of the base of an emitter follower is usually

 open.
 low.
 shorted to ground.
  high.

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Analog Electronics
A electric current ratio of IC / IE is usually less than one and is called

  θ.
  ω.
  β.
  α.

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Analog Electronics
The input offset electric current equals the

 average of the two base currents.
 collector electric current divided by the base current.
 difference between the two base currents.
 difference between the two base-emitter voltages.

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

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Analog Electronics
Which of the following is the pentavalent material ?

 Neon
 Gallium
 Boron
 Arsenic

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Analog Electronics
In a MOSFET, the polarity of the inversion layer is the same as that of the

  majority carries in the source .
  charge on the gate electrode.
  minority carriers in the drain .
  majority carries in the substrate.

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