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Power Electronics

Power Electronics
When the emitter terminal of a UJT is open, the resistance between the base terminal is generally ___________.

Low
High
Extremely low
None of these

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Power Electronics
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be

 1500 A.
 4242.64 A.
 2121.32 A.
 6000 A.

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

 Microwave transistor.
 Schottky diode.
  Power MOSFET.
 BJT.

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Power Electronics
A single phase full bridge inverter can operate in load commutation mode in case load consists of

 RLC overdamped.
 RL.
 RLC critically damped.
  RLC underdamped.

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Power Electronics
A Triac has three terminals viz ___________

None of these
Two main terminal and a gate terminal
Drain, source, gate
Cathode, anode, gate

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Power Electronics
Which following is a two terminal three layer device?

 MOSFET.
 BJT.
 None of above.
  Power dioed.

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