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Analog Electronics

Analog Electronics
The number of valence electrons in silicon atom are :

 3
 4
 2
 1

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Analog Electronics
The most commonly used amplifier in sample & hold circuits is

An inverting amplifiers with a gain of 100
A unity gain inverting amplifier
An inverting amplifier with a gain of 10
A unity gain non-inverting amplifier

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Analog Electronics
The collector characteristics of a common - emitter connected transistor may be used to find its

  voltage gain.
  output resistance .
  input resistance.
  base current.

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Analog Electronics
An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is

5KΩ
1/11KΩ
1/5KΩ
11KΩ

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Analog Electronics
A Schottky diode is a

 fast recovery diode.
 minority carrier device.
 both a majority and a minority carrier diode.
 majority carrier device.

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Analog Electronics
Generally, the gain of a transistor amplifier falls at high frequencies due to the

Internal Capacitance of the device
Coupling capacitor at the output
Coupling capacitor at the input
Skin effect

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