Analog Electronics
Which is the factor on which total number of electrons in an atom depends ?

None of these
 atomic size
 atomic weight
 atomic number

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

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