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Analog Electronics

Analog Electronics
Which are the mobile charge carriers present in semiconductor diode ?

 Holes
 Both A & B
 Neutrons
 Electrons

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Analog Electronics
The base of an npn transistor is thin and

 metallic.
  lightly doped.
 doped by a pentavalent material.
 heavily doped.

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Analog Electronics
The input voltage to an emitter follower is usually

 equal to the supply voltage.
 greater than the generator voltage.
  less than the generator voltage.
 equal to the generator voltage.

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Analog Electronics
An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed

39.5mV
795mV
395mV
79.5 mV

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Analog Electronics
If the series resistance increases in an unloaded zener regulator, the zener current

  increases.
  equals the voltage divided by the resistance.
  decreases.
  stays the same.

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Analog Electronics
The most commonly used semiconductor is

 Carbon
 Silicon
 Sulphur
 Germanium

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