Subject Repository
Electrical Engineering Mcqs
Showing 3641 – 3660 of 3,699 verified multiple choice questions with answers and explanations.
Q3641NTS / FPSC / PPSC
Let of a thyristor Vc1, Vc2, Vc3 are forward break over voltage for gate current Ig1, Ig2, Ig3 respectively. Then________________?
Q3642NTS / FPSC / PPSC
Which of following devices has highest di/dt and dv/dt capability?
Q3643NTS / FPSC / PPSC
Which triggering is the most reliable____________?
Q3644NTS / FPSC / PPSC
Leakage current flows through the thyristor in_________?
Q3645NTS / FPSC / PPSC
Which of the following is disadvantage of fast recovery diodes?
Q3646NTS / FPSC / PPSC
When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ___________?
Q3647NTS / FPSC / PPSC
A power semiconductor may undergo damage due to____________?
Q3648NTS / FPSC / PPSC
CB used for over current protection of thyristor operates when the fault current is__________?
Q3649NTS / FPSC / PPSC
If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?
Q3650NTS / FPSC / PPSC
What is used to protect the SCR from over current ________________?
Q3651NTS / FPSC / PPSC
Under normal operating condition voltage clamping device offers impedance of_________?
Q3652NTS / FPSC / PPSC
Which semiconductor device acts like a diode and two transistor?
Q3653NTS / FPSC / PPSC
Under over voltage condition impedance offered by the voltage clamping device is__________?
Q3654NTS / FPSC / PPSC
The latching current of GTO should be of order
Q3656NTS / FPSC / PPSC
Example of a voltage clamping device______________?
Q3658NTS / FPSC / PPSC
Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?
Q3659NTS / FPSC / PPSC
Thyristor can be protected from over voltages by using____________?
Q3660NTS / FPSC / PPSC