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Analog Electronics

Analog Electronics
Which impurity is added into semiconductor to increase its conductivity ?

None of these
 doping
 extrinsic
 intrinsic

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Analog Electronics
The biasing circuit that gives best stability to Q point is

  potential divider biasing.
  base resistance biasing.
  emitter resistor biasing.
  feedback resistor biasing .

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Analog Electronics
Voltage controlled oscillators are used commonly in

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

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Analog Electronics
Energy gap of semiconductor is approx

 0 eV.
 1 eV.
 > 8 eV .
 5 - 8 eV.

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Analog Electronics
The effective channel length of a MOSFET in a saturation decreases with increase in

Source voltage
Gate voltage
Drain voltage
Body voltage

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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?

 34.3 %.
 45.5 %.
 66.3 %.
 52.8 %.

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