Which of following is normally ON device?
Which of following is normally ON device?
A. SIT
B. BJT
C. TRIAC
D. IGBT
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A full wave rectifier with resistive load produces___________?
A full wave rectifier with resistive load produces___________?A. Second harmonic
B. Third harmonic
C. Fifth harmonic
D. Do not produce harmonicsA modern power semiconductor device that combines the characteristic of BJT and MOSFET is_____________?
A modern power semiconductor device that combines the characteristic of BJT and MOSFET is_____________?A. IGBT
B. FCT
C. MCT
D. GTOThe Graetz bridge makes excellent use of ______________?
The Graetz bridge makes excellent use of ______________?A. Current transformer
B. Potential transformer
C. Power transformer
D. SCRThe latching current of GTO should be of order
The latching current of GTO should be of orderA. 100 mA
B. 500 mA
C. 1 A
D. 2 AWhich of the following is disadvantage of fast recovery diodes?
Which of the following is disadvantage of fast recovery diodes?A. Recovery is only 5 µs
B. Recovery is only 50 µs
C. Dog is carried out
D. None of theseA thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 KA. The voltage and current rating of available SCRs are 1800 V and 1000 A. For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be_____________?
A thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 KA. The voltage and current rating of available SCRs are 1800 V and 1000 A. For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be_____________?A. 5, 7
B. 4, 6
C. 7, 5
D. 6, 4