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Analog Electronics

Analog Electronics
The emitter of the transistor is doped

  heavily.
  moderately.
  lightly.
  none of these

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Analog Electronics
If the load resistance increases in a zener regulator, the zener current

  decreases.
  equals the source voltage divided by series resistance.
  Increases.
  stays the same.

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Analog Electronics
Which impurity is added into semiconductor to increase its conductivity ?

 doping
None of these
 intrinsic
 extrinsic

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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
79.5 mV
795mV
395mV

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Analog Electronics
Why holes are not created in a metal ?

 The forbidden band is missing
 Both 1 & 2
None of these
 The conduction band and valance band are overlapped

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Analog Electronics
The extremely high input impedance of a MOSFET is primarily due to the

  absence of its channel.
  extremely small leakage electric current of its gate capacitor.
  negative gate-source voltage.
  depletion of electric current carriers.

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