Power Electronics CB used for over current protection of thyristor operates when the fault current is of short duration. neither (A) nor (B). of long period. both (A) and (B). of short duration. neither (A) nor (B). of long period. both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is 130 μs. 145 μs. 135 μs. 140 μs. 130 μs. 145 μs. 135 μs. 140 μs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Example of a voltage clamping device aluminium block. snubber circuit. fast acting fuse. metal oxide varistor. aluminium block. snubber circuit. fast acting fuse. metal oxide varistor. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics What is used to protect a thyristor from high di / dt conditions? Snubber circuit. Fuse. Inductor. Voltage clamping device. Snubber circuit. Fuse. Inductor. Voltage clamping device. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Power electronics essentially deals with control of a.c. power at ___________. Frequencies above 20 kHz Frequencies less than 10 Hz Frequencies above 1000 kHz 50 Hz frequency Frequencies above 20 kHz Frequencies less than 10 Hz Frequencies above 1000 kHz 50 Hz frequency ANSWER DOWNLOAD EXAMIANS APP
Power Electronics SCR will be turned off when anode current is less than holding current. both (A) and (B). < latching current but greater than holding current and gate signal is 0. < latching current but greater than holding current and gate signal is present. less than holding current. both (A) and (B). < latching current but greater than holding current and gate signal is 0. < latching current but greater than holding current and gate signal is present. ANSWER DOWNLOAD EXAMIANS APP
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