Power Electronics MCQs with answers Page - 20

Here, you will find a collection of MCQ questions on Power Electronics. Go through these questions to enhance your preparation for upcoming examinations and interviews.

To check the correct answer, simply click the View Answer button provided for each question.

Have your own questions to contribute? Click the button below to share your MCQs with others!

+ Add Question

A

Admin • 833.24K Points
Coach

Q. The frequency of the ripple in the output voltage of 3-phase semiconductor depends on:

  • (A) Firing angle and load resistance
  • (B) Firing angle and load inductance
  • (C) The load circuit parameters
  • (D) Firing angle and the supply frequency

A

Admin • 833.24K Points
Coach

Q. A single-phase full bridge inverter can operate in load-commutation mode in case load consists of:

  • (A) RL load
  • (B) RLC underdamped
  • (C) RLC damped
  • (D) RLC critically damped

A

Admin • 833.24K Points
Coach

Q. Practical way of obtaining static voltage equalization in series connected SCRs is by the use of:

  • (A) One resistor across the string
  • (B) Resistors of different values across each SCR
  • (C) Resistors of the same value across each SCR
  • (D) One resistor in series with each SCR

A

Admin • 833.24K Points
Coach

Q. A resistor connected across the gate and cathode of an SCR in a circuit increases its

  • (A) dv/dt rating
  • (B) Holding current
  • (C) Noise Immunity
  • (D) Turn-off time

A

Admin • 833.24K Points
Coach

Q. In thyristor, holding current is:

  • (A) more than the latching current
  • (B) less than the latching current
  • (C) equal to latching current
  • (D) none of the above

A

Admin • 833.24K Points
Coach

Q. When a thyristor turn on, the gate drive:

  • (A) can be turned down but thyristor remains in on position
  • (B) cannot be turned down as thyristor will be turned off
  • (C) gate drive has no impact on starting and turning off the thyristor
  • (D) none of the above

A

Admin • 833.24K Points
Coach

Q. A thyristor can be termed as:

  • (A) DC switch
  • (B) AC switch
  • (C) both AC and DC switch
  • (D) none of the above

A

Admin • 833.24K Points
Coach

Q. During forward blocking state, a thyristor is associated with:

  • (A) large current and low voltage
  • (B) low current and large voltage
  • (C) medium current and large voltage
  • (D) None of the above

A

Admin • 833.24K Points
Coach

Q. Turn-off time of an SCR is measured from the instant:

  • (A) anode current becomes zero
  • (B) anode voltage becomes zero
  • (C) anode voltage and anode current becomes zero
  • (D) gate current becomes zero

A

Admin • 833.24K Points
Coach

Q. A forward voltage can be applied to an SCR after its:

  • (A) anode current reduces to zero
  • (B) gate recovery time
  • (C) reverse recovery time
  • (D) anode voltage reduces to zero

Add MCQ in this Category

If you want to share an MCQ question in this category, it's a great idea! It will be helpful for many other students using this website.

Share Your MCQ

Browse Categories

Click on category to learn MCQs of that category.