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Analog Electronics

Analog Electronics
An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is

0.25
1
0.75
0.5

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Analog Electronics
What will happen if doping of an intrinsic semiconductor with pentavalent impurity atom ?

 Fermi level raises
 Fermi level not change
None of these
 Fermi level fall

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Analog Electronics
Suppose the base resistor is open. The Q point will be

  at the lower end of the load line.
 at the upper end of the load line.
 in the middle of the load line.
 off the load line.

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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
Which of following is the point of reference JFET?

  Drain.
  Gate.
  None of above.
  Source.

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Analog Electronics
A 3 - phase diode bridge rectifier is fed from a 400 V rms, 50 Hz, 3 phase AC source. If the load is purely resistive, then peak instantaneous output voltage is equal to

 400√ 2 V.
 400 / √ 3 V.
 400√ (2/3) V.
 400 V.

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