Switching frequency of SITH is____________?
A. 5 KHz
B. 10 KHz
C. 60 KHz
D. 100 KHz
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?
A. One resistor across the string
B. Resistors of the same value across each SCR
C. Resistors of different values across each SCR
D. One resistor in series with each SCR
Thyristor can be protected from over voltages by using____________?
Thyristor can be protected from over voltages by using____________?
A. voltage clamg device.
B. fuse.
C. heat sink.
D. snubber circuit.
Thyristor can be protected from over voltages by using
Thyristor can be protected from over voltages by using
A. 23 mA.
B. 40 mA.
C. 10 mA.
D. 60 mA.
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
A single phase full bridge inverter can operate in load commutation mode in case load consists of____________?
A. RL.
B. RLC underdamped.
C. RLC overdamped.
D. RLC critically damped.
The function of snubber circuit connected across the SCR is to___________?
The function of snubber circuit connected across the SCR is to___________?
A. Suppress dV / dt.
B. Increase dV / dt.
C. Decrease dV / dt.
D. Decrease di / dt.
For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?
For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?
A. 111.9 Ω.
B. 11.19 Ω.
C. 108 Ω.
D. 115 Ω
In forward blocking mode of a thyristor________?
In forward blocking mode of a thyristor________?
A. junction J2 is in reverse bias and J1, J3 is in forward bias.
B. junction J3 is in forward bias and J1, J2 is in reverse bias.
C. Junction J1, J3 is in reverse bias and J2 is in forward bias.
D. Junction J1 and J2 is in forward bias and J3 is in reverse bias.
In reverse blocking mode of a thyristor______?
In reverse blocking mode of a thyristor______?
A. junction J2 is in reverse bias and J1, J3 is in forward bias.
B. junction J3 is in forward bias and J1, J2 in reverse bias.
C. junction J1, J3 is in reverse bias and J2 is in forward bias.
D. junction J1 and J2 is in forward bias and J3 is in reverse bias.
If holding current of a thyristor is 2 mA then latching current should be_____?
If holding current of a thyristor is 2 mA then latching current should be_____?
A. 0.01 A.
B. 0.002 A.
C. 0.009 A.
D. 0.004 A.