Power Electronics MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Power Electronics, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Power Electronics MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Power Electronics mcq questions that explore various aspects of Power Electronics problems. Each MCQ is crafted to challenge your understanding of Power Electronics principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Power Electronics MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Power Electronics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Power Electronics knowledge to the test? Let's get started with our carefully curated MCQs!

Power Electronics MCQs | Page 18 of 42

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Q171.
The waveshape of output voltage of half bridge inverter is
Discuss
Answer: (b).square
Q172.
A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/f is constant. At 50 Hz, the speed is 1440 rpm. At 25 Hz, the speed is likely to be
Discuss
Answer: (b).about 720 rpm
Q173.
The gate current required to turn on an SCR is
Discuss
Answer: (b).a few mA
Q174.
Assertion (A): A high dv/dt may cause triggering of a thyristor.

Reason (R): A high dv/dt results in charging current in the thyristor.
Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q175.
Assertion (A): When an SCR is conducting, the voltage drop across is about 1 V.

Reason (R): When an SCR is conducting, the junction temperature is about 200°C.
Discuss
Answer: (c).A is correct but R is wrong
Q176.
When the core of a saturable reactor is saturated, the inductance is high.
Discuss
Answer: (b).False
Q177.
In controlled heating circuits, thyristors act as
Discuss
Answer: (c).ac regulator
Q178.
In a fully controlled bridge converter feeding a resistive load the waveshapes of output voltage and output current
Discuss
Answer: (a).are always similar
Q179.
Assertion (A): A GTO circuit is more compact than SCR circuit

Reason (R): A GTO can be turned off by negative gate pulse.
Discuss
Answer: (a).Both A and R are correct and R is correct explanation of A
Q180.
In a single phase full wave ac regulator, the firing angles in the two half cycles
Discuss
Answer: (a).are always equal