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Analog Electronics

Analog Electronics
In a CB amplifier the maximum efficiency could be

85%
50%
99%
25%

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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.
  VB.
  ( VB )- 1 / 2.
  1 / VB.

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Analog Electronics
What will be the Potential barrier for Ge Diode ?

 0.03V
 0.3V
 0.5V
 0.7V

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Analog Electronics
What will be the Potential barrier for Si Diode ?

 0.05 V
 0.7 V
 0.3 V
 0.07 V

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

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Analog Electronics
Why holes are not created in a metal ?

 The forbidden band is missing
 Both 1 & 2
 The conduction band and valance band are overlapped
None of these

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