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Analog Electronics

Analog Electronics
The most commonly used semiconductor is

 Carbon
 Sulphur
 Germanium
 Silicon

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Analog Electronics
The extremely high input impedance of a MOSFET is primarily due to the

  absence of its channel.
  depletion of electric current carriers.
  negative gate-source voltage.
  extremely small leakage electric current of its gate capacitor.

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

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Analog Electronics
If the zener diode in a zener regulator is connected with the wrong polarity, the load voltage will be closest to

  14 V.
  0.7 V.
  10 V.
  18 V.

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Analog Electronics
Which of the following does not obey the Ohm's law?

 Bilateral device
 Resistor
 Semiconductor
None of these

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Analog Electronics
For a diode, reverse recovery time is defined as the time between the instant diode current becomes zero and the instant reverse recovery current decays to

 10% of reverse peak current.
 0.
 15% of reverse peak current.
  25% of reverse peak current.

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