Analog Electronics
Input impedance of MOSFET is

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

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Analog Electronics
The typical input stage of an opamp has a

  single - ended input and single-ended output.
  differential input and differential output.
  single - ended input and differential output.
  differential input and single - ended output.

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