Power Electronics Latching current for an SCR inserted between a dc voltage source of 200 V and load is 100 mA. Compute the minimum rate of width pulse required to turn ON the SCR in case load consists of R = 20 Ω in series with L = 0.2 H. 200 µs. 150 µs. 100 µs. 300 µs. 200 µs. 150 µs. 100 µs. 300 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Leakage current flows through the thyristor in both forward and reverse blocking mode. forward conduction mode. forward blocking mode. reverse blocking mode. both forward and reverse blocking mode. forward conduction mode. forward blocking mode. reverse blocking mode. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Dynamic equalising circuit is useful both B and C. to limit dV / dt of SCR. to limit di / dt of SCR. for voltage equalisation. both B and C. to limit dV / dt of SCR. to limit di / dt of SCR. for voltage equalisation. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics During reverse recovery time both B and C. charge carrier of junction J1 is swept out. charge carrier of junction J2 recombined. charge carrier of junction J3 is swept out. both B and C. charge carrier of junction J1 is swept out. charge carrier of junction J2 recombined. charge carrier of junction J3 is swept out. 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 120°. 60° to 180°. 30° to 150°. 30° to 180°. 60° to 120°. 60° to 180°. 30° to 150°. 30° to 180°. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Practical way of obtaining static voltage equalization in series connected SCRs is by the use of one resistor across the string. one resistor in series with each SCR. resistors of different values across each SCR. resistors of the same value across each SCR. one resistor across the string. one resistor in series with each SCR. resistors of different values across each SCR. resistors of the same value across each SCR. ANSWER DOWNLOAD EXAMIANS APP
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