Power Electronics Delay time is defined by the interval when anode voltage drops from 100 % to 90 % of its actual value. all of these. gate current increases from 90 % to 100 % of its final value. anode current reaches 10 % from forward leakage current. anode voltage drops from 100 % to 90 % of its actual value. all of these. gate current increases from 90 % to 100 % of its final value. anode current reaches 10 % from forward leakage current. 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 ? Fast acting current limiting device (FACL fuse). Voltage clamping device. Snubber circuit. CB. Fast acting current limiting device (FACL fuse). Voltage clamping device. Snubber circuit. CB. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics CB used for over current protection of thyristor operates when the fault current is of long period. 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. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Power electronics essentially deals with control of a.c. power at ___________. 50 Hz frequency Frequencies above 1000 kHz Frequencies less than 10 Hz Frequencies above 20 kHz 50 Hz frequency Frequencies above 1000 kHz Frequencies less than 10 Hz Frequencies above 20 kHz ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Thyristor can be protected from over voltages by using fuse. heat sink. snubber circuit. voltage clamping device. fuse. heat sink. snubber circuit. voltage clamping device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR? 3.3 µs 3 µs. 3.1 µs 3.2 µs 3.3 µs 3 µs. 3.1 µs 3.2 µs ANSWER DOWNLOAD EXAMIANS APP
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