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Analog Electronics

Analog Electronics
Assume that diode D1, D2 in figure are ideal diodes. The value of current is mcq-diagram

 2 mA.
 1 mA.
 0.5 mA.
 0 mA.

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Analog Electronics
In a nonlinear op-amp circuit, the

  feedback loop is never opened.
  opamp may saturate.
  opamp never saturates.
  output shape is the same as the input shape.

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Analog Electronics
The current gain of a BJT is

gm /rπ
gm r0
gm rπ
gm / r0

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Analog Electronics
The conduction loss verses device current characteristics of power MOSFET in best approximately by

 an exponentially decaying function.
 a straight line.
 a rectangular hyperbola.
 a parabola.

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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

1/5KΩ
11KΩ
1/11KΩ
5KΩ

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Analog Electronics
Depending upon the switching recovery time and on state drop, the power diodes are types

 Fast recovery, Schottky.
  General purpose, fast recovery and schottly.
 None of these.
 General purpose, fast recovery.

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