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. 150 µs. 200 µs. 100 µs. 300 µs. 150 µs. 200 µs. 100 µs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Dynamic equalizing circuit is used for equal division of current through each thyristor in parallel. equal division of current through each thyristor in series. equal division of voltage across each thyristor in parallel. equal division of voltage across each thyristor. equal division of current through each thyristor in parallel. equal division of current through each thyristor in series. equal division of voltage across each thyristor in parallel. equal division of voltage across each thyristor. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The maximum di/dt in a SCR is Directly proportional to inductance in the circuit. Directly proportional to supply voltage. Inversely proportional to supply voltage. Both A and B. Directly proportional to inductance in the circuit. Directly proportional to supply voltage. Inversely proportional to supply voltage. Both A and B. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When a UJT is turned ON, the resistance between emitter terminal and lower base terminal ___________ None of these Is increased Remains the same Is decreased None of these Is increased Remains the same Is decreased 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 30° to 180°. 60° to 120°. 30° to 150°. 60° to 180°. 30° to 180°. 60° to 120°. 30° to 150°. 60° to 180°. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics For series connected SCR’s dynamic equalising circuit consists of series R and diode with C across R. R and C in series but with diode across R. series R and diode with C across R. R and C in series but with diode across C. series R and diode with C across R. R and C in series but with diode across R. series R and diode with C across R. R and C in series but with diode across C. ANSWER DOWNLOAD EXAMIANS APP
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