POWER ELECTRONICS AND APPLICATIONS

POWER ELECTRONICS AND APPLICATIONS

Professional Development

12 Qs

quiz-placeholder

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POWER ELECTRONICS AND APPLICATIONS

POWER ELECTRONICS AND APPLICATIONS

Assessment

Quiz

Special Education, Professional Development, Science

Professional Development

Practice Problem

Hard

Created by

vnanthakumar scteng

Used 1+ times

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12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Once SCR starts conducting a forward current, its gate loses control over

Anode circuit current only

Anode circuit voltage only

Anode circuit voltage and current

Anode circuit voltage, current and time

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a thyristor, the magnitude of anode current will

Increase if gate current is increased

Increase if gate current is decreased

Decrease if gate current is decreased

Not change with any variation in gate current

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Surge current rating of an SCR specified the maximum

Repetitive current with sine wave

Non-repetitive current with rectangular wave

Non-repetitive current with sine wave

Repetitive current with rectangular wave

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

For an SCR, dv/dt protection is achieved through the use of

RL in series with SCR

RC across

L in series with

RC in series with

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The applied sine voltage to a SCR is VM=200V and R=10Ohm. If the gate trigger lags the ac supply by 120°, the average load current is

15/π A

5/π A

-5/π A

-15/π A

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A sine voltage of 200Vrms, 50Hz is applied to an SCR through 100ohm resistor. The firing angle is 60°. Consider no voltage drop. The output voltage in rms is

89.7 V

126.7 V

166.7 V

200√2 V

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The cycloconverter require natural or forced commutation as under

Natural commutation in both step-up and step down cyclo converter

Forced commutation in both step-up and step-down cyclo converter

Forced commutation in step-up cyclo converter

Forced commutation in step-down cycloconverter

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