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Analog Electronics

Analog Electronics
A silicon pn junction in forward condition has a voltage drop closer to

 2.1 V.
 0.7 V.
 0.1 V.
 1.7 V.

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Analog Electronics
A zener diode voltage regulator has load requirement of 12 V and 2 Amp. The zener diode's minimum current requirement is 0.2 A. The minimum voltage at input is 24 V. What is maximum efficiency of circuit?

 66.3 %.
 34.3 %.
 45.5 %.
 52.8 %.

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Analog Electronics
When the diode is forward biased, it is equivalent to

  an off switch.
  an on switch.
None of these
  a high resistance.

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Analog Electronics
Most of the electrons in the base of an NPN transistor do not recombine because they

 must flow through the base.
 flow out of the base.
 have a negative charge.
  have a long lifetime.

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Analog Electronics
A transistor has how many PN junctions?

  2.
 3.
 4.
 1.

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Analog Electronics
The β of a transistor is the ratio of the

 collect current to emitter current.
 emitter current to collector current.
 base current to collector current.
  collect current to base current.

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