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Analog Electronics

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

None of these
 Insulating
 Doping
 Conducting

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Analog Electronics
The current gain of a pnp transistor is

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

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Analog Electronics
If the collector resistor opens in a base-biased circuit, the load line will become

  horizontal.
 vertical.
 flat.
 useless.

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Analog Electronics
The transit time of the electric current carriers through the channel of a JFET decides it’s ________________ characteristics.

 drain.
 source.
 source and drain.
 gate.

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Analog Electronics
An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed

395mV
795mV
79.5 mV
39.5mV

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Analog Electronics
If the collector resistor is open, the collector voltage is

 unknown.
  low.
 unchanged.
 high.

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