Power Electronics Between the peak point and the valley point of UJT emitter characteristics we have ___________ region Saturation Cut-off None of these Negative resistance Saturation Cut-off None of these Negative resistance ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Power electronics essentially deals with control of a.c. power at ___________. Frequencies above 1000 kHz Frequencies above 20 kHz 50 Hz frequency Frequencies less than 10 Hz Frequencies above 1000 kHz Frequencies above 20 kHz 50 Hz frequency Frequencies less than 10 Hz ANSWER DOWNLOAD EXAMIANS APP
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 ? Snubber circuit. Voltage clamping device. CB. Fast acting current limiting device (FACL fuse). Snubber circuit. Voltage clamping device. CB. Fast acting current limiting device (FACL fuse). 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? 108 ohm 111.9 ohm 115 ohm 11.19 ohm 108 ohm 111.9 ohm 115 ohm 11.19 ohm ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT has ___________. None of these Three pn junctions One pn junction Two pn junctions None of these Three pn junctions One pn junction Two pn junctions ANSWER DOWNLOAD EXAMIANS APP
Power Electronics How can we protect SCR from thermal conditions ? Use of snubber circuit. Using CB and fuse. Using equalizing circuit. Using heat sink. Use of snubber circuit. Using CB and fuse. Using equalizing circuit. Using heat sink. ANSWER DOWNLOAD EXAMIANS APP
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