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Analog Electronics

Analog Electronics
When VGS = 0 V, a JFET is

  cut off.
  saturated.
  an analog device.
  an open switch.

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Analog Electronics
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are

fT =1.33 x 1012 Hz & fβ = 1.47 x 1010 Hz
fT =1.47 x 1010 Hz & fβ = 1.33 x 1012 Hz
fT =1.47 x 1010 Hz & fβ = 1.64 x 108 Hz
fT =1.64 x 108 Hz & fβ = 1.47 x 1010 Hz

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Analog Electronics
The β of a transistor may be determined directly from the curve plotted between

  VBE and IE for constant VCE.
  VCE and IC for constant IE.
  VCE and IE for constant IB.
  VCE and IC for constant IB.

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Analog Electronics
When P-type substance is connected with negative and n-type is connected with positive terminal of the battery then P-n junction diode is in ....................

 Reverse biased
 No biased
None of these
 Forward biased

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Analog Electronics
The number of orbiting electrons in germanium atom are :

 36
 42
 28
 32

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

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

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