Analog Electronics
When a reverse bias is applied to gate of JFET the depletion region width

  is uniform in the channel.
None of these
  is wider near the drain and tapers near source.
  is wider near the source and tapers near the drain.

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Analog Electronics
Voltage Series (feedback also called series-shunt feedback) results in

Decreases in both input & output impedances
Increase in both input & output impedances
Increase in input impedance & decreases in output impedance
Decrease in input impedance & increase in output impedance

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