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Analog Electronics

Analog Electronics
An opamp has a voltage gain of 200,000. If the output voltage is 1 V, the input voltage is

  5 5 micro V.
  2 micro V.
  10 V.
  1 V.

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Analog Electronics
A zener diode

  has a barrier potential of 1 V.
  has a constant voltage in the breakdown region.
  is a battery.
  is forward biased.

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Analog Electronics
Which of the following transistor configuration circuit is much less temperature dependent ?

  Common emitter.
None of these
  Common collector.
  Common base.

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

  0.3 V.
  0.5 V.
  0.9 V.
  0.7 V.

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Analog Electronics
A 10 V DC regulator power supply has a regulation of 0.005 %. The output voltage will vary within an envelope of __________________ milivolt.

  0.5.
  0.05.
  2.5.
  5.

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Analog Electronics
A zener diode voltage regulator has load requirement of 12 V and 2 Amp. The zener diode's minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is maximum efficiency of circuit?

 52.8 %.
 66.3 %.
 34.3 %.
 45.5 %.

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