What is used to protect the SCR from over current ________________?
A. CB and fuse. B. Heat sink. C. Snubber circuit. D. Voltage clamping device.
Electrical mcqs
A thyristor is basically________?
A. PNPN device B. a combination of diac and triac C. a set of SCRs D. a set if SCR,diac and triac
A Triac has three terminals viz ___________?
A. Drain, source, gate B. Two main terminal and a gate terminal C. Cathode, anode, gate D. None of the above
An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be_____?
A. 1500 A. B. 6000 A. C. 2121.32 A. D. 4242.64 A.
The typical value of SCR for modern alternator is____________?
A. 1.5. B. 0.5. C. 1.0. D. 1.2.
A substance whose molecules consist of dissimilar atoms is called____________?
A. semi-conductor B. super-conducto C. compound D. insulator