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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

  0.5 V.
  0.7 V.
  0.3 V.
  0.9 V.

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Analog Electronics
Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is

51dB
98dB
102dB
49dB

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

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

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Analog Electronics
Voltage controlled oscillators are used commonly in

 Frequency Modulators
 Phase Clocked loops
 All the above
 Pulse Modulators Frequency Modulators Phase Clocked loops

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Analog Electronics
The negative part of the output signal in a transistor circuit starts clipping if the Q point of the circuit moves

  toward the cutoff point.
  toward the center of the load line.
  toward the saturation point.
None of these

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Analog Electronics
What will be the Potential barrier for Si Diode ?

 0.05 V
 0.3 V
 0.07 V
 0.7 V

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