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Analog Electronics

Analog Electronics
The feedback factor of a Wien bridge oscillator using Op-Amp is

 1
 1/3
 1/2
 1/4

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Analog Electronics
An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is

5KΩ
11KΩ
1/11KΩ
1/5KΩ

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Analog Electronics
Energy gap of conductor is

 0 eV.
 8 eV.
 1 - 2 eV.
 5 - 8 eV.

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Analog Electronics
A zener diode

  has a constant voltage in the breakdown region.
  is a battery.
  has a barrier potential of 1 V.
  is forward biased.

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Analog Electronics
In a normally biased npn transistor, the electrons in the emitter have enough energy to overcome the barrier potential of the

 base - collector junction.
  base - emitter junction.
 recombination path.
 collector - base junction.

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Analog Electronics
When there is no base current in a transistor switch, the output voltage from the transistor is

  high.
 unknown.
 low.
 unchanged.

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