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Analog Electronics

Analog Electronics
Donors to a semiconductor material is

 Trivalant
 Divalant
 Pentavalant
 Tetravalant

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Analog Electronics
If the base resistor is very small, the transistor will operate in the

 active region.
 cutoff region.
All of these
  saturation region.

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

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

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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

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

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Analog Electronics
The reverse saturation electric current of a pn junction varies with temperature (T) as

  T.
  T2.
  independent of T.
  1 / T.

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Analog Electronics
Which of following is not an essential element of a DC power supply?

  Filter.
  Voltage amplifier.
  Voltage regulator.
  Rectifier.

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