Get App on

Play Store

Electrical Engineering Mcqs

IGBT combines the advantages of_____________?

  • (A)  BJTs and SITs
  • (B)  BJTs and MOSFETs
  • (C)  SITs and MOSFETs
  • (D)  None of these
Submitted By :Ali Uppal


Which of the following is used in SCR to protect from high dV / dt__________________?

  • (A)  Snubber circuit
  • (B)  Fuse
  • (C)  Equalizing circuit
  • (D)  Circuit breaker
Submitted By :Ali Uppal


COOLMOS device can be used in application up to power range of___________?

  • (A)  1 KVA
  • (B)  2 KVA
  • (C)  500 VA
  • (D)  100 KVA
Submitted By :Ali Uppal


What is used to protect a thyristor from high di / dt conditions__________?

  • (A)  Fuse.
  • (B)  Snubber circuit
  • (C)  Inductor
  • (D)  Voltage clamping device
Submitted By :Ali Uppal


SITH is also known as___________?

  • (A)  Filled controlled diode
  • (B)  Filled controlled rectifier
  • (C)  Silicon controlled rectifier
  • (D)  None of these
Submitted By :Ali Uppal


The typical time of rising time lies between______________?

  • (A)  10 – 20 µs
  • (B)  40 – 60 µs
  • (C)  1 – 4 µs
  • (D)  90 – 100 µs
Submitted By :Ali Uppal


Submitted By :Ali Uppal


Maximum power loss occurs during_________________?

  • (A)  delay time
  • (B)  rise time
  • (C)  spread time
  • (D)  all
Submitted By :Ali Uppal


Spread time is defined as the interval during which_____________?

  • (A)  anode voltage drops from 10 % of its initial value to zero
  • (B)  anode current rises from 90 % to its final value
  • (C)  both (A) and (B)
  • (D)  anode current rises from 10 % to 90 % of its final value
Submitted By :Ali Uppal


The turn-on time of an SCR with inductive load is 20 µs. The puls train frequency is 2.5 KHz with a mark/space ratio of 1/10, then SCR will___________?

  • (A)  Turn on
  • (B)  Not turn on
  • (C)  Turn on if inductance is removed
  • (D)  Turn on if pulse frequency us increased to two times
Submitted By :Ali Uppal