Analog Electronics
The main factor which makes a MOSFET likely to breakdown during the normal handling

  high input resistance.
  high leakage current.
  very low gate capacitance.
  both (A) and (C).

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Analog Electronics
For transistor action

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

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