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. 300 µs. 200 µs. 100 µs. 150 µs. 300 µs. 200 µs. 100 µs. 150 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Typical range of thyristor turn OFF time is 3 - 500 µs. 3 - 50 µs. 3 - 100 µs. 3 - 10 µs. 3 - 500 µs. 3 - 50 µs. 3 - 100 µs. 3 - 10 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The capacitance of reversed bised junction J2 in a thyristor is CJ2 = 20 pF and can be assumed to be independant of the off state voltage. The limiting value of the charging current to turn on the thyristor is 16 mA. What is the critical value of dv/dt? 800 V/µs. 1000 V/µs. 600 V/µs. 1200 V/µs. 800 V/µs. 1000 V/µs. 600 V/µs. 1200 V/µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________ Is decreased None of these Remains the same Is increased Is decreased None of these Remains the same Is increased ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A diac has ___________ pn junctions None of these Three Four Two None of these Three Four Two ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Maximum di / dt in a SCR is inversely proportional to Vm of supply voltage. both A and C. directly proportional to Vm of supply voltage. inversely proportional to L in the circuit. inversely proportional to Vm of supply voltage. both A and C. directly proportional to Vm of supply voltage. inversely proportional to L in the circuit. ANSWER DOWNLOAD EXAMIANS APP
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