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Analog Electronics

Analog Electronics
Semiconductor material is

 Pentavalent
 Tetravalent
 Trivalent
 Bilateral

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Analog Electronics
What will happen if doping of an intrinsic semiconductor with pentavalent impurity atom ?

 Fermi level not change
 Fermi level fall
 Fermi level raises
None of these

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Analog Electronics
A 555 IC is used to produce

 clock
 counter
 register
 byte

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Analog Electronics
The collector characteristics of a common - emitter connected transistor may be used to find its

  voltage gain.
  base current.
  output resistance .
  input resistance.

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Analog Electronics
Voltage controlled oscillators are used commonly in

 Pulse Modulators Frequency Modulators Phase Clocked loops
 Phase Clocked loops
 All the above
 Frequency Modulators

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Analog Electronics
In a properly biased NPN transistor most of the electrons from the emitter

  recombine with holes in the base .
  recombine in the emitter its self.
  pass through the base to the collector.
  are stopped by the junction barrier.

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