Test: Power Electronics - 5

# Test: Power Electronics - 5

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## 25 Questions MCQ Test Power Electronics | Test: Power Electronics - 5

Test: Power Electronics - 5 for Electrical Engineering (EE) 2023 is part of Power Electronics preparation. The Test: Power Electronics - 5 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Power Electronics - 5 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 - 5 below.
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Test: Power Electronics - 5 - Question 1

### Multiphase choppers are used in

Test: Power Electronics - 5 - Question 2

### In a single phase converter using a centre tapped transformer and with a highly inductive load, the firing angles is a. Each thyristor conducts for a period

Test: Power Electronics - 5 - Question 3

### In a parallel inverter

Test: Power Electronics - 5 - Question 4

A step up chopper can give an output voltage

Test: Power Electronics - 5 - Question 5

The specified maximum junction temperature of thyristors is about

Test: Power Electronics - 5 - Question 6

A bridge type single phase cycloconverter changes the frequency f to f/3. Then one half wave of output contains

Test: Power Electronics - 5 - Question 7

A half bridge inverter

Test: Power Electronics - 5 - Question 8

A 3 phase series inverter has

Test: Power Electronics - 5 - Question 9

In figure, thyristor Th is in off state. When thyristor is turned on, the peak thyristor current can be

Test: Power Electronics - 5 - Question 10

HVDC systems are preferable for only long distances.

Test: Power Electronics - 5 - Question 11

Surge current rating of an SCR is

Test: Power Electronics - 5 - Question 12

Which of the following devices has metal-silicon junction?

Test: Power Electronics - 5 - Question 13

In a single phase full wave converter (M-2 connection) feeding on R-L load the input voltage is v = Vm sin ωt. The expression for rms output voltage is

Test: Power Electronics - 5 - Question 14

A dc chopper is feeding an RLE load. The condition for maximum ripple is

Test: Power Electronics - 5 - Question 15

In a series inverter

Test: Power Electronics - 5 - Question 16

The total number of leads in SUS, SBS and SCS respectively are

Test: Power Electronics - 5 - Question 17

Which of these devices can conduct in both directions?

Test: Power Electronics - 5 - Question 18

Assertion (A): A half wave controlled rectifier has poorer efficiency and higher ripple factor than a full wave controlled rectifier.

Reason (R): The use of a freewheeling diode in half wave controlled rectifier circuit improves the waveform of load current and circuit power factor.

Test: Power Electronics - 5 - Question 19

A 3 phase dual converter consists of

Test: Power Electronics - 5 - Question 20

Which inverter circuit uses coupled inductors?

Test: Power Electronics - 5 - Question 21

When an SCR is in forward blocking mode, the applied voltage

Test: Power Electronics - 5 - Question 22

In sinusoidal PWM for inverters the width of different pulses are not the same.

Test: Power Electronics - 5 - Question 23

A class D chopper

Test: Power Electronics - 5 - Question 24

The symbol in figure is for

Test: Power Electronics - 5 - Question 25

The efficiency of a chopper circuit is about

## Power Electronics

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## Power Electronics

5 videos|39 docs|63 tests