Power Electronics The UJT may be used as ___________. None of these A rectifier Am amplifier A sawtooth generator None of these A rectifier Am amplifier A sawtooth generator ANSWER DOWNLOAD EXAMIANS APP
Power Electronics CB used for over current protection of thyristor operates when the fault current is of short duration. of long period. neither (A) nor (B). both (A) and (B). of short duration. of long period. neither (A) nor (B). both (A) and (B). ANSWER DOWNLOAD EXAMIANS APP
Power Electronics How can we protect SCR from thermal conditions ? Using heat sink. Use of snubber circuit. Using equalizing circuit. Using CB and fuse. Using heat sink. Use of snubber circuit. Using equalizing circuit. Using CB and fuse. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The V-I characteristics for a triac in the first and third quadrants are essentially identical to those of ___________ in its first quadrant None of these SCR Transistor UJT None of these SCR Transistor UJT ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which statement is true for latching current ? It is related to turn off process of the device. It is related to conduction process of device. Both C and D. It is related to turn on process of the device. It is related to turn off process of the device. It is related to conduction process of device. Both C and D. It is related to turn on process of the device. 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. 1200 V/µs. 1000 V/µs. 600 V/µs. 800 V/µs. 1200 V/µs. 1000 V/µs. 600 V/µs. ANSWER DOWNLOAD EXAMIANS APP
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