Power Electronics Materials used in heat sink should have high thermal conductivity. high melting point. large surface area. All of these. high thermal conductivity. high melting point. large surface area. All of these. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A string of n parallel SCRs is operated at 72 KA, the rating of each SCR is 1 KA. If derating factor of the string is 0.1. Then calculate the value of n 70. 90. 80. 60. 70. 90. 80. 60. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Rise time is defined by the interval when both B and C. anode voltage drops from 90 % to 10 % of its initial value. gate current rises from 90 % to 100 % of it final value. anode current rises 10 % to 90 % of its final value. both B and C. anode voltage drops from 90 % to 10 % of its initial value. gate current rises from 90 % to 100 % of it final value. anode current rises 10 % to 90 % of its final value. 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? 3.1 µs 3 µs. 3.2 µs 3.3 µs 3.1 µs 3 µs. 3.2 µs 3.3 µs ANSWER DOWNLOAD EXAMIANS APP
Power Electronics After proper turn on of thyristor None of these gate signal must be removed. gate signal should present but can be removed. gate signal is always present. None of these gate signal must be removed. gate signal should present but can be removed. gate signal is always present. 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 135 μs. 130 μs. 145 μs. 140 μs. 135 μs. 130 μs. 145 μs. 140 μs. ANSWER DOWNLOAD EXAMIANS APP
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