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Analog Electronics

Analog Electronics
What is the range of energy band gap of semiconductors ?

 14-15 ev
 1-3 ev
 10-15 ev
 0 ev

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Analog Electronics
The base of an npn transistor is thin and

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

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Analog Electronics
If the emitter resistance decreases, the

 Q point stays where it is.
 current gain increases.
 collector current decreases.
  Q point moves up.

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

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

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Analog Electronics
MOSFET can be used as a

Current controlled inductor
Voltage controlled inductors
Voltage controlled capacitor
Current controlled capacitor

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Analog Electronics
When VGS = 0 V, a JFET is

  cut off.
  an analog device.
  an open switch.
  saturated.

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