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Power Electronics

Power Electronics
A power semiconductor may undergo damage due to

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

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Power Electronics
By which one of the following we can measure the reliability of a string?

 Factor of safety.
 Reliability factor.
 String efficient.
  Derating factor.

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Power Electronics
The device that exhibits negative resistance region is ___________.

Diac
Transistor
Triac
UJT

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Power Electronics
A triac can pass a portion of ___________ half-cycle through the load.

Only positive
None of these
Only negative
Both positive and negative

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Power Electronics
A diac is turned on by ___________.

Gate voltage
None of these
A breakover voltage
Gate current

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Power Electronics
A single phase full bridge inverter can operated in load commutation mode in case load consist of

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

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