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Electrical Engineering Mcqs

The power MOSFET device is a___________?

  • (A)  Current controlled unipolar device
  • (B)  Voltage controlled unipolar device
  • (C)  Current controlled bipolar device
  • (D)  Voltage controlled bipolar device
Submitted By :Ali Uppal

In dual converters________________?

  • (A)  Both rectifiers provides positive current to the load
  • (B)  Both rectifiers provide negative current to the load
  • (C)  One rectifiers provide positive current to the load and the other negative current
  • (D)  One rectifier provide positive current to the source and the other negative current to the load
Submitted By :Ali Uppal

TRIAC is a semiconductor power electronic device which contains____________?

  • (A)  Two SCR’s connected in reverse parallel
  • (B)  Two SCR’s connected in parallel
  • (C)  Two SCR’s connected in series
  • (D)  Two BJT’s connected in series
Submitted By :Ali Uppal

The curve between V and I of SCR when anode is positive w.r.t cathode and when anode is negative w.r.t cathode are known as_____________________?

  • (A)  both as forward characteristics
  • (B)  both as reverse characteristics
  • (C)  former as forward characteristics and later as reverse characteristics
  • (D)  former as reverse characteristics and later as forward characteristics
Submitted By :Ali Uppal

An SCR can be used___________?

  • (A)  as static conductor
  • (B)  for power control
  • (C)  for speed control of dc shunt motor
  • (D)  All of these
Submitted By :Ali Uppal

With gate open, the maximum anode current at which SCR is turned off from ON condition is called____________?

  • (A)  breakdown voltage
  • (B)  peak reverse voltage
  • (C)  holding current
  • (D)  latching current
Submitted By :Ali Uppal

A crowbar is a circuit which is used to protect a_____________?

  • (A)  voltage sensitive load from excessive dc power supply output voltages
  • (B)  current sensitive load from excessive dc power supply output voltages
  • (C)  voltage sensitive load from excessive ac power supply output voltages
  • (D)  current sensitive load from excessive ac power supply output voltages
Submitted By :Ali Uppal

Bidirectional semiconductor device is___________?

  • (A)  Diode
  • (B)  BJT
  • (C)  SCR
  • (D)  TRIAC
Submitted By :Ali Uppal

A full wave rectifier with resistive load produces___________?

  • (A)  Second harmonic
  • (B)  Third harmonic
  • (C)  Fifth harmonic
  • (D)  Do not produce harmonics
Submitted By :Ali Uppal

An ideal diode is___________?

  • (A)  Unidirectional
  • (B)  Bidirectional
  • (C)  Fixed voltage polarity
  • (D)  Only (a) and (c)
Submitted By :Ali Uppal

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