Analog Electronics
Electron mobility is defined as

None of these
 Drift velocity per unit field
 Diffusion velocity per unit field
 the movement of electrons

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Analog Electronics
Pinch-off voltage in a JFET is

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

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