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Analog Electronics

Analog Electronics
In deriving ac equivalent circuit for an amplifier circuit we short circuit

All inductors
All transistors
All capacitors
All resistors

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Analog Electronics
The emitter of the transistor is generally doped the heaviest because it

  must possess low resistance.
  has to supply the charge carriers.
  has to dissipate maximum power.
  is the first region of transistor.

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Analog Electronics
A 741-type OP-amp has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of

100 KHz
1000/7.07 KHz
50 KHz
1000/17 KHz

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Analog Electronics
Energy gap of semiconductor is approx

 1 eV.
 5 - 8 eV.
 0 eV.
 > 8 eV .

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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 %.
 45.5 %.
 34.3 %.

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

Drain voltage
Gate voltage
Source voltage
Body voltage

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