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Analog Electronics

Analog Electronics
Which process is used for adding impurity into a pure semiconductor material ?

 Conducting
 Doping
None of these
 Insulating

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Analog Electronics
The properties of JFET resemble those of

  PNP transistors.
  thermionic valves.
  UJT.
  NPN transistors.

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Analog Electronics
The current gain of a pnp transistor is

 the ratio of collector current to emitter current.
 the collector current divided by the emitter current.
 the negative of the npn current gain.
 near zero.

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Analog Electronics
The input offset electric current equals the

 difference between the two base currents.
 difference between the two base-emitter voltages.
 average of the two base currents.
 collector electric current divided by the base current.

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Analog Electronics
MOSFET uses the electric field of

  none of these.
  gate capacitance to control the channel current.
  both (A) and (B).
  barrier potential of p-n junction to control the channel current.

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Analog Electronics
When were the first solid state devices manufactured ?

 1970
 1960
 1950
 1940

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