Analog Electronics
When pn junction is reverse biased

 it offers a very high resistance
 the witdh of depletion layer increases
All of these
 a small current flows through it because of minority carriers

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Analog Electronics
Pinch-off voltage in a JFET is

 the drain voltage that gives infinite drain current.
 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 zero drain current.

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