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Analog Electronics

Analog Electronics
Barrier potential at the temperature (25°C) is 0.7 V, its value at 125°C is

  0.9 V.
  0.3 V.
  0.7 V.
  0.5 V.

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

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Analog Electronics
A JFET can operate in

  depletion and enhancement mode only.
  enhancement mode only.
  depletion mode only.
  none of these.

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Analog Electronics
In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at

The p⁺n junction
The edge of the depletion region on the p-side
The edge of the depletion region on the n-side
The center of the depletion region on the n-side

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Analog Electronics
Reverse saturation electric current in a silicon pn junction diode nearly doubles for very

  5° rise in temperature.
  10° rise in temperature.
  2° rise in temperature.
  6° rise in temperature.

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Analog Electronics
What is true about the breakdown voltage in a zener diode?

  It is approximately constant.
  It equals the electric current times the resistance.
  It destroys the diode.
  It decreases when electric current increases.

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