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Test: Power Electronics - 8


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25 Questions MCQ Test Power Electronics | Test: Power Electronics - 8

Test: Power Electronics - 8 for Electrical Engineering (EE) 2023 is part of Power Electronics preparation. The Test: Power Electronics - 8 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Power Electronics - 8 MCQs are made for Electrical Engineering (EE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Power Electronics - 8 below.
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Test: Power Electronics - 8 - Question 1

In a 3 phase bridge inverter, the gating signals for the three phases have a phase difference of

Test: Power Electronics - 8 - Question 2

 

Assertion (A): The circuit of figure thyristor will conduct for 180º during positive half cycle if it is continuously fired.

Reason (R): A thyristor can conduct only when it is forward biased.

 

Test: Power Electronics - 8 - Question 3

The total number of leads in SCR, DIAC and TRIAC respectively are

Test: Power Electronics - 8 - Question 4

A single phase semiconverter is feeding a highly inductive load and has a freewheeling diode across the load. The waveshape of input current is

Test: Power Electronics - 8 - Question 5

In the below figure, the load is highly inductive. The firing angle is a for each of the thyristors. The periods of conduction of Th1 and Th2 respectively are

Test: Power Electronics - 8 - Question 6

A crowbar circuit is generally needed for protection under fault conditions.

Test: Power Electronics - 8 - Question 7

The number of leads in a DIAC are

Test: Power Electronics - 8 - Question 8

Forward rating of an SCR is

Test: Power Electronics - 8 - Question 9

The condition for underdamped oscillations in a series RLC circuit is

Test: Power Electronics - 8 - Question 10

The method of triggering SCS is

Test: Power Electronics - 8 - Question 11

The number of thyristors in a single phase fully controlled bridge rectifier is

Test: Power Electronics - 8 - Question 12

In a bridge inverter

Test: Power Electronics - 8 - Question 13

An ideal rectifier should have

Test: Power Electronics - 8 - Question 14

When thyristors are connected in parallel, the current distribution may become non-uniform due to

Test: Power Electronics - 8 - Question 15

A single phase fully controlled bridge converter is fed by a voltage Vm sin ωt. The average and rms values of output voltage are

Test: Power Electronics - 8 - Question 16

In a single phase half wave ac regulator feeding a resistive load, the rms load current

Test: Power Electronics - 8 - Question 17

Which of the following is correct for a BJT?

Test: Power Electronics - 8 - Question 18

In a bridge inverter with single pulse width modulation

Test: Power Electronics - 8 - Question 19

In a modified series inverter with two inductors and two capacitors, the load current

Test: Power Electronics - 8 - Question 20

The number of layers in a Shockley diode are

Test: Power Electronics - 8 - Question 21

In a modified series inverter

Test: Power Electronics - 8 - Question 22

Assertion (A): Light triggering is very suitable for HVDC transmission.

Reason (R): Light triggering has the advantage of complete electrical isolation of gate circuit.

Test: Power Electronics - 8 - Question 23

Class A and class B chopper

Test: Power Electronics - 8 - Question 24

To turn off an SCR, it is necessary to reduce its current to less than :

Test: Power Electronics - 8 - Question 25

When a single phase dual converter is operating in circulating current mode

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