Analog Electronics
The arrowhead on the transistor symbol points in the direction of

  majority carrier flow in the emitter region.
  minority carrier flow in the emitter region.
  electron flow in the emitter region.
  conventional electric current flow in the emitter region.

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Analog Electronics
Why is silicon preferred than germanium ?

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

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