Analog Electronics
Optocouplers combine

 IGBTs and MOSFETs.
 SITs and BJTs.
 Power transistor and silicon transistor.
  Infrared light emitting diode and a silicon photo transistor.

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Analog Electronics
A Semiconductor has a

 Negative Temperature coefficient of resistance
None of these
 Constant Temperature coefficient of resistance
 Positive Temperature coefficient of resistance

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