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Power Electronics

Power Electronics
A diac is turned on by ___________.

Gate voltage
A breakover voltage
Gate current
None of these

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Power Electronics
Power transistor are type of

 MOSFETs.
 BJTs.
 IGBTs.
  All of above.

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Power Electronics
Which one is most suitable power device for high frequency (>100 KHz) switching application?

  Power MOSFET.
 BJT.
 Microwave transistor.
 Schottky diode.

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Power Electronics
A power semiconductor may undergo damage due to

 Low di/dt.
 Low dv/dt.
 High dv/dt.
  High di/dt.

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Power Electronics
Power electronics essentially deals with control of a.c. power at ___________.

Frequencies above 1000 kHz
Frequencies less than 10 Hz
50 Hz frequency
Frequencies above 20 kHz

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Power Electronics
Which of the following is used in heat sink?

 Carbon.
 Silver.
 Iron.
  Aluminium.

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