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Power Electronics

Power Electronics
A thyristor will be triggered when Vg = 1.5 volt and Ig = 100 mA in the given figure. Calculate the value of R in ohm is

 3.714.
 60.
  37.14.
 65.

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Power Electronics
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of

 one resistor in series with each SCR.
 one resistor across the string.
  resistors of the same value across each SCR.
 resistors of different values across each SCR.

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

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

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Power Electronics
A diac is turned on by ___________.

Gate current
Gate voltage
None of these
A breakover voltage

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Power Electronics
Maximum power loss occurs during

 delay time.
 spread time.
  rise time.
 all.

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Power Electronics
The device that does not have the gate terminal is ___________.

FET
Diac
SCR
Triac

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