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Analog Electronics

Analog Electronics
The number of valence electrons in silicon atom are :

 3
 2
 1
 4

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

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

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Analog Electronics
The value of total collector electric current in a CB circuit is

  IC = αIE.
  IC = αIE + ICO.
  IC = αIE - ICO.
  IC = βIE.

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Analog Electronics
A 3 - phase diode bridge rectifier is fed from a 400 V rms, 50 Hz, 3 phase AC source. If the load is purely resistive, then peak instantaneous output voltage is equal to

 400 V.
 400√ 2 V.
 400 / √ 3 V.
 400√ (2/3) V.

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Analog Electronics
The trapped energy of an inductive load can be feed back to the input supply through a diode known as

 None of these.
 Powe diode.
  Feed back diode.
 Zener diode.

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Analog Electronics
Feedback circuit in an oscillator can be accomplished by

 Inductive coupling between input and output
 Any one or combinations of the above methods
 Capacitive coupling between input and output
 Resistive coupling between input and output

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