Power Electronics When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ? Fast acting current limiting device (FACL fuse). CB. Snubber circuit. Voltage clamping device. Fast acting current limiting device (FACL fuse). CB. Snubber circuit. Voltage clamping device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics For an SCR gate cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance? 111.9 ohm 108 ohm 11.19 ohm 115 ohm 111.9 ohm 108 ohm 11.19 ohm 115 ohm ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A triac can pass a portion of ___________ half-cycle through the load. None of these Only negative Only positive Both positive and negative None of these Only negative Only positive Both positive and negative ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What happen due to high di / dt? Insulation failure. Breakdown of junction. None of these. Local hot spot. Insulation failure. Breakdown of junction. None of these. Local hot spot. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Power electronics essentially deals with control of a.c. power at ___________. 50 Hz frequency Frequencies less than 10 Hz Frequencies above 1000 kHz Frequencies above 20 kHz 50 Hz frequency Frequencies less than 10 Hz Frequencies above 1000 kHz Frequencies above 20 kHz ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The device that exhibits negative resistance region is ___________. Diac Transistor Triac UJT Diac Transistor Triac UJT ANSWER DOWNLOAD EXAMIANS APP
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