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Analog Electronics

Analog Electronics
Which of following is the point of reference JFET?

  Drain.
  None of above.
  Gate.
  Source.

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Analog Electronics
For a diode, reverse recovery time is defined as the time between the instant diode current becomes zero and the instant reverse recovery current decays to

  25% of reverse peak current.
 15% of reverse peak current.
 0.
 10% of reverse peak current.

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Analog Electronics
The silicon transistor are more widely used than germanium transistors because

  they have smaller leakage current.
  they have larger electric current carrying capacity.
  they have smaller depletion layer.
  they have better ability to dissipate heat.

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Analog Electronics
If the series resistance increases in an unloaded zener regulator, the zener current

  decreases.
  stays the same.
  equals the voltage divided by the resistance.
  increases.

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Analog Electronics
Donors to a semiconductor material is

 Trivalant
 Divalant
 Pentavalant
 Tetravalant

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Analog Electronics
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are

25 Ω & 20 %
25 Ω & 16.7 %
5 Ω & 16.7 %
5 Ω & 20 %

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