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Analog Electronics

Analog Electronics
For Germanium pn junction, the maximum value of barrier potential is

 1.5V
 0.3V
 0.7V
 1.6V

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Analog Electronics
MOSFET uses the electric field of

  gate capacitance to control the channel current.
  both (A) and (B).
  barrier potential of p-n junction to control the channel current.
  none of these.

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Analog Electronics
The Barkhausen criterion for an oscillator

 Loop gain should be unity
 The phase of a feedback signal with respect to input should be 0° or 360°
 Loop gain should be less than unity
 Both A and C

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Analog Electronics
Asource follower using an FET usually has a voltage gain which is

Slightly less than unity but positive
About -10
Exactly unity but negative
Greater than +100

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Analog Electronics
Negative feedback in an amplifier

Reduces gain
Increase frequency &phase distortion
Reduces bandwidth
Increases noise

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Analog Electronics
Single phase, 230 V, 1 KW heater is connected acrose single phase 230 V, 50 Hz supply through a diode. The power delivered to the heater element

 100 W.
 None of above.
 1000 W.
  500 W.

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