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Test: Power Electronics - 6


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25 Questions MCQ Test Power Electronics | Test: Power Electronics - 6

Test: Power Electronics - 6 for Electrical Engineering (EE) 2023 is part of Power Electronics preparation. The Test: Power Electronics - 6 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Power Electronics - 6 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 - 6 below.
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Test: Power Electronics - 6 - Question 1

In a single phase full wave ac regulator feeding R-L load, the gate pulses

Test: Power Electronics - 6 - Question 2

In a semi converter feeding a resistive load,

Test: Power Electronics - 6 - Question 3

In a single phase semi-converter the number of thyristors is

Test: Power Electronics - 6 - Question 4

A dc chopper is feeding an RLE load. The current can become discontinuous if

Test: Power Electronics - 6 - Question 5

Which of these commutation methods uses two leads?

Test: Power Electronics - 6 - Question 6

A single phase half wave rectifier is feeding a resistive load. As firing angle is increased

Test: Power Electronics - 6 - Question 7

A cycloconverter for single phase operation has

Test: Power Electronics - 6 - Question 8

A chopper is a high efficiency circuit.

Test: Power Electronics - 6 - Question 9

The difference between resonant commutation and self commutation is

Test: Power Electronics - 6 - Question 10

If 0.5 T is the time period of oscillations and Toff is the time between turn off of one thyristor and turn on of second thyristor, the frequency of output f of a series inverter is

Test: Power Electronics - 6 - Question 11

In a series inverter

Test: Power Electronics - 6 - Question 12

A NAND gate has 3 inputs and one output. The number of thyristors required for this gate are

Test: Power Electronics - 6 - Question 13

Which of these devices is used in relaxation oscillator?

Test: Power Electronics - 6 - Question 14

In auxiliary commutated chopper fed by voltage V and having L and C commutating elements, the peak value of capacitor current is

Test: Power Electronics - 6 - Question 15

In a single phase semiconverter feeding a highly inductive load, the load current is

Test: Power Electronics - 6 - Question 16

Two thyristors of the same rating and specifications

Test: Power Electronics - 6 - Question 17

A 3 phase induction motor is controlled by voltage and frequency control such that the ratio V/f is constant. At 50 Hz, the starting torque is 100 N-m. At 25 Hz, the starting torque

Test: Power Electronics - 6 - Question 18

In a three phase to single phase full wave bridge cycloconverter, the number of thyristors is

Test: Power Electronics - 6 - Question 19

A single phase half wave converter is feeding-a resistor load. The input voltage is v = Vm sin ωt. If firing angle is zero, the output dc voltage Vdc and output rms voltage Vrms respectively

Test: Power Electronics - 6 - Question 20

In a cycloconverter it is possible to vary

Test: Power Electronics - 6 - Question 21

A single phase full bridge inverter for R-L loads needs

Test: Power Electronics - 6 - Question 22

In the basic series inverter circuit, the source current has

Test: Power Electronics - 6 - Question 23

Thyristors connected in series need static and dynamic stabilizing circuits.

Test: Power Electronics - 6 - Question 24

In a controlled rectifier a freewheeling diode is necessary if the load is

Test: Power Electronics - 6 - Question 25

For an illumination control circuit it is advisable to use a matched TRIAC-DIAC pair.

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