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Power Electronics MCQs: 272 Questions & Answers in Engineering

272 Power Electronics MCQs in Engineering with answers & explanations. Page 3. Practice objective questions for competitive exams, interviews & self-assessme… Use the answer toggle below to show or hide all solutions, tap an option to check one question, or open a question for its own page.

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Power Electronics MCQs: 272 Questions & Answers in Engineering

In an arc rectifier the drop in voltage at the cathode is approximately

For 3 phase rotary converters, when power factor is unity. the ac line to dc current ratio is

In arc rectifiers mercury is chosen as the liquid for rectifier because

Ionization potential of mercury is approximately

Least undulating current will be delivered by which mercury arc rectifier

In a mercury arc rectifier the cathode voltage drop is due to

In mercury arc rectifier, voltage drop at anode is due to

The average life of the glass bulb rectifier is

The vacuum inside the glass bulb of a mercury arc rectifier is of the order of

A chopper is a

Which device can be used in a chopper circuit?

The load voltage of a chopper can be controlled by varying the

What is the duty cycle of a chopper ?

The values of duty cycle (α) lies between

If T is the time period for a chopper circuit and α is its duty cycle, then the chopping frequency is

In AC voltage controllers the

AC voltage controllers convert

The GTO can be turned off

The GTO (gate turn-off thyristor) is a

In GTO The anode current is ideally limited by the

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