Electrical Engineering Mcqs

Submitted By: Ali Uppal


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

Submitted By: Ali Uppal


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

Submitted By: Ali Uppal


A PNPN device having two gates is ___________?

(A) Diac

(B) Triac

(C) SUS

(D) BCS

Submitted By: Ali Uppal


A silicon controlled racitifier (SCR) is a ____________?

(A) Unijunction device

(B) Device with three junction

(C) Device with four junction

(D) None of the above

Submitted By: Ali Uppal


A thyristor equivalent of a thyratron tube is a _________?

(A) Diac

(B) Triac

(C) Silicon controlled-rectifier SCR

(D) None of above

Submitted By: Ali Uppal


A Triac is a ______________?

(A) 2 terminal switch

(B) 2 terminal bilateral switch

(C) 3 terminal bilateral switch

(D) 3 terminal bidirectional switch

Submitted By: Ali Uppal


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.

Submitted By: Ali Uppal


Submitted By: Ali Uppal


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.

Submitted By: Ali Uppal