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Analog Electronics

Analog Electronics
Which impurity is added into semiconductor to increase its conductivity ?

 intrinsic
 doping
None of these
 extrinsic

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Analog Electronics
A forward potential of 10 V is applied to a silicon diode. A resistance of 1KΩ is also in series with the diode. The electric current is

  9.3 mA.
  0.
  10 mA.
  0.7 mA.

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

  high.
 low.
 unchanged.
 unknown.

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Analog Electronics
Avalanche breakdown in a diode occurs when

  forward electric current exceeds certain value.
  potential barrier is reduced to zero.
None of these
  reverse bias exceeds a certain value.

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Analog Electronics
The current gain of a BJT is

gm r0
gm / r0
gm rπ
gm /rπ

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Analog Electronics
When P-type substance is connected with negative and n-type is connected with positive terminal of the battery then P-n junction diode is in ....................

None of these
 Forward biased
 Reverse biased
 No biased

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