Electrical Engineering Mcqs

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.

Submitted By: Ali Uppal


Which statement is true for latching current ___________?

(A) It is related to turn off process of the device.

(B) It is related to conduction process of device.

(C) It is related to turn on process of the device.

(D) Both C and

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Submitted By: Ali Uppal


What is used to protect the SCR from over current ________________?

(A) CB and fuse.

(B) Heat sink.

(C) Snubber circuit.

(D) Voltage clamping devic

Submitted By: Ali Uppal


Under normal operating condition voltage clamping device offers impedance of_________?

(A) high value.

(B) low value.

(C) zero value.

(D) moderate valu

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Submitted By: Ali Uppal


The latching current of GTO should be of order

(A) 100 mA

(B) 500 mA

(C) 1 A

(D) 2 A

Submitted By: Ali Uppal


The maximum di/dt in a SCR is____________?

(A) Directly proportional to supply voltage

(B) Directly proportional to inductance in the circuit

(C) Inversely proportional to supply voltage

(D) Both A and B

Submitted By: Ali Uppal