Analog Electronics
The base - emitter voltage is usually

 none of these.
 equal to the base supply voltage.
  less than the base supply voltage.
 more than the base supply voltage.

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Analog Electronics
Why is silicon preferred than germanium ?

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

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