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

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

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Analog Electronics
Pinch-off voltage in a JFET is

 the gate to source voltage that gives unity drain current.
 the gate to source voltage that gives zero drain current.
 the drain voltage that gives infinite drain current.
 the drain voltage that gives zero drain current.

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