Power Electronics Rise time is defined by the interval when anode voltage drops from 90 % to 10 % of its initial value. both B and C. anode current rises 10 % to 90 % of its final value. gate current rises from 90 % to 100 % of it final value. anode voltage drops from 90 % to 10 % of its initial value. both B and C. anode current rises 10 % to 90 % of its final value. gate current rises from 90 % to 100 % of it final value. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A UJT has ___________. One pn junction None of these Three pn junctions Two pn junctions One pn junction None of these Three pn junctions Two pn junctions ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is 60° to 180°. 60° to 120°. 30° to 150°. 30° to 180°. 60° to 180°. 60° to 120°. 30° to 150°. 30° to 180°. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A diac is ___________ switch An c. A mechanical None of these A d.c. An c. A mechanical None of these A d.c. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Thyristor can be protected from over voltages by using heat sink. snubber circuit. fuse. voltage clamping device. heat sink. snubber circuit. fuse. voltage clamping device. 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 0.3 ohm 3.0 ohm 0.03 ohm 0.3 ohm 0.3 ohm 3.0 ohm ANSWER DOWNLOAD EXAMIANS APP
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