Analog Electronics
In MOSFET devices the N-channel type is better the P-channel type in the following respects

  it is faster.
  it has better noise immunity.
  it has better drive capability.
  it is TTL compatible.

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Analog Electronics
For transistor action

  all of these.
  Je must be forward biased and Jc should be reverse biased.
  the emitter should be heavily doped.
  the base region must be very thin and lightly doped.

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