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Analog Electronics

Analog Electronics
Which of following is the fastest switching device ?

  Triode.
  JFET.
  MOSFET.
  BJT.

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

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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 ....................

 Forward biased
 No biased
None of these
 Reverse biased

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Analog Electronics
The DC electric current gain in common collector configuration is given by

  β + 1.
  α.
  β.
  α - 1.

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Analog Electronics
Input impedance of MOSFET is

  more than that of FET and BJT.
  less than of FET but more than BJT.
  less than that of FET and BJT.
  more than that of FET but less than BJT.

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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

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

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