Power Electronics A UJT has ___________. Two pn junctions Three pn junctions None of these One pn junction Two pn junctions Three pn junctions None of these One pn junction ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When the temperature increases, the intrinsic stand off ratio ___________. Decreases None of these Increases Essentially remains the same Decreases None of these Increases Essentially remains the same ANSWER DOWNLOAD EXAMIANS APP
Power Electronics SCRs are used in series to meet high current demand. low voltage demand. low current demand. high voltage demand. high current demand. low voltage demand. low current demand. high voltage demand. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A 200 A thyristor is to be operated in parallel with a 300 A thyristor. The ON state voltage drops are 1.5 V and 1.2 Volts. What is the value of resistance R to be connected in series with each thyristor, so that current through the combination is 500 A and each of them is fully loaded ? 0.03 ohm 0.3 ohm 3.0 ohm 0.3 ohm 0.03 ohm 0.3 ohm 3.0 ohm 0.3 ohm 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 ? Voltage clamping device. Snubber circuit. CB. Fast acting current limiting device (FACL fuse). Voltage clamping device. Snubber circuit. CB. Fast acting current limiting device (FACL fuse). ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The triac is ___________. Not a thyristor Like a bidirectional SCR None of these A four-terminal device Not a thyristor Like a bidirectional SCR None of these A four-terminal device ANSWER DOWNLOAD EXAMIANS APP
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