Analog Electronics
A small collector current with zero base current is caused by the leakage current of the

  collector diode.
 transistor.
 base diode.
 emitter diode.

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Analog Electronics
Why is silicon preferred than germanium ?

 All the above
 Silicon has higher tolerance to temperature
 Current sensitivity of silicon with temperature is less
 Leakage current due to minority charge carrier is less in silicon

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