Power Electronics During reverse recovery time charge carrier of junction J1 is swept out. charge carrier of junction J3 is swept out. charge carrier of junction J2 recombined. both B and C. charge carrier of junction J1 is swept out. charge carrier of junction J3 is swept out. charge carrier of junction J2 recombined. both B and C. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Rise time is defined by the interval when anode voltage drops from 90 % to 10 % of its initial value. anode current rises 10 % to 90 % of its final value. both B and C. gate current rises from 90 % to 100 % of it final value. anode voltage drops from 90 % to 10 % of its initial value. anode current rises 10 % to 90 % of its final value. both B and C. gate current rises from 90 % to 100 % of it final value. 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 if pulse frequency us increased to two times. Turn on if inductance is removed. Turn on. Not turn on. Turn on if pulse frequency us increased to two times. Turn on if inductance is removed. Turn on. Not turn on. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant None of these Transistor UJT SCR None of these Transistor UJT SCR 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). Voltage clamping device. CB. Snubber circuit. Fast acting current limiting device (FACL fuse). Voltage clamping device. CB. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT is sometimes called ___________ diode. Single-base Double-base Low resistance High resistance Single-base Double-base Low resistance High resistance ANSWER DOWNLOAD EXAMIANS APP
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