Power Electronics MCQs with answers Page - 26

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 • 828.03K Points
Coach

Q. A single phase bridge type cycloconverter uses eight thyristors.

  • (A) True
  • (B) False
  • (C) none
  • (D) all

A

Admin • 828.03K Points
Coach

Q. In the basic series inverter circuit, the source supplies load

  • (A) only in positive half cycle
  • (B) both in positive and negative half cycles
  • (C) only in part of positive half cycle
  • (D) in positive half cycle and part of negative half cycle

A

Admin • 828.03K Points
Coach

Q. The specified maximum junction temperature of thyristors is about

  • (A) 50°C
  • (B) 80°C
  • (C) 120°C
  • (D) 200°C

A

Admin • 828.03K Points
Coach

Q. A half bridge inverter

  • (A) needs a 3 wire dc supply
  • (B) may use a two wire or 3 wire dc supply
  • (C) has higher output voltage if fed from 3 wire dc supply
  • (D) has higher efficiency if fed from 3 wire dc supply

A

Admin • 828.03K Points
Coach

Q. A 3 phase series inverter has

  • (A) 12 thyristors
  • (B) 6 thyristors
  • (C) 3 thyristors
  • (D) 3 or 6 thyristors

A

Admin • 828.03K Points
Coach

Q. Surge current rating of an SCR is

  • (A) the maximum repetitive surge current in which the SCR can withstand
  • (B) the maximum non-repetitive surge current in which the SCR can withstand
  • (C) the maximum repetitive or non repetitive surge current in which the SCR can withstand
  • (D) the maximum surge current in which the SCR can withstand if both surge current and steady current exist together

A

Admin • 828.03K Points
Coach

Q. Which of the following devices has metal-silicon junction?

  • (A) General purpose power diode
  • (B) Schottky diode
  • (C) SCR
  • (D) MOSFET

A

Admin • 828.03K Points
Coach

Q. A string of series connected thyristors needs equalising circuit to

  • (A) ensure proper firing
  • (B) ensure proper current division
  • (C) ensure proper voltage division
  • (D) none of the above

A

Admin • 828.03K Points
Coach

Q. The minimum gate current which can turn on SCR is called :

  • (A) trigger current
  • (B) holding current
  • (C) junction current
  • (D) breakover current

A

Admin • 828.03K Points
Coach

Q. Which of these devices can conduct in both directions?

  • (A) SCR
  • (B) SUS
  • (C) SBS
  • (D) UJT

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.