Power Electronics Calculate the maximum voltage that can be safely blocked by the string shown in figure, if maximum allowable leakage current is 2 mA? 10 KV. 6 KV. 8 KV. 2 KV. 10 KV. 6 KV. 8 KV. 2 KV. 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 ? 0.3 ohm 0.03 ohm 3.0 ohm 0.3 ohm 0.3 ohm 0.03 ohm 3.0 ohm 0.3 ohm ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The UJT may be used as ___________. A rectifier None of these Am amplifier A sawtooth generator A rectifier None of these Am amplifier A sawtooth generator 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 140 μs. 145 μs. 130 μs. 135 μs. 140 μs. 145 μs. 130 μs. 135 μs. 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 A diac is simply ___________. A single junction device A three junction device A triac without gate terminal None of these A single junction device A three junction device A triac without gate terminal None of these ANSWER DOWNLOAD EXAMIANS APP
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