Power Electronics A UJT has ___________. Two pn junctions One pn junction None of these Three pn junctions Two pn junctions One pn junction None of these Three pn junctions 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. Fast acting current limiting device (FACL fuse). CB. Voltage clamping device. Snubber circuit. Fast acting current limiting device (FACL fuse). CB. Voltage clamping device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will Turn on. Not turn on. Turn on if inductance is removed. Turn on if pulse frequency us increased to two times. Turn on. Not turn on. Turn on if inductance is removed. Turn on if pulse frequency us increased to two times. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The typical value of SCR for modern alternator is 1.2. 1.5. 1.0. 0.5. 1.2. 1.5. 1.0. 0.5. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which following is a two terminal three layer device? MOSFET. BJT. None of above. Power dioed. MOSFET. BJT. None of above. Power dioed. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics CB used for over current protection of thyristor operates when the fault current is neither (A) nor (B). both (A) and (B). of short duration. of long period. neither (A) nor (B). both (A) and (B). of short duration. of long period. ANSWER DOWNLOAD EXAMIANS APP
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