Power Electronics 2

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1. Maximum firing angle possible in an RC firing circuit is

180

360

Depends on load

About This Quiz

Switching Characteristics of Power Electronics Devices

2. What first name or nickname would you like us to use?

You may optionally provide this to label your report, leaderboard, or certificate.

2. For a pure DC with no harmonics:

Form Factor

Voltage ripple factor

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3. Thyristor can turn OFF by which of the following NOTE: many answers may exist

Decreasing gate current below latching current

Decreasing anode current below latching current

Applying reverse voltage across the thyristor

By removing gate signal

4. Initially @ t=0

V=Vmax, I=0

And at t=t1

V=Vmax, I=Imax

And at t=t2

V=0, I=Imax

Assuming the rise and fall to be linear, which of the following are correct

Turn off, Energy loss is VI(t1+t2)/2

Turn on, Energy loss is VI(t1+t2)/2

Turn off, Energy loss is VI(t1+t2)

Turn on, Energy loss is VI(t1+t2)

5. Which of the following is a manufacturer specified Thyristor rating

Maximum RMS anode current

Maximum average anode current rating

Surge current rating

All of the above

6. If drift region region in a power devise is increased, then NOTE: many answers may exist

Reverse blocking capability increases

Forward conduction losses increases

Forward conduction losses doesn't change but reverse blocking capacity increases

No drift region is present in a power semi conductor devise

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7. Which of the following is/are voltage commutation

Class B

Class C

Class D

Class F

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8. Switching frequency of a power electronic devise is mostly affected by:

Reverse recovery charge

Turn off time

Source inductance

Load inductance

It is affected mainly by the reverse recovery charge and there by the turn off time

Explanation

It is affected mainly by the reverse recovery charge and there by the turn off time

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9. Match the following

BJT

MOSFET

Thyristor

Parallel Operation

Current commutation

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Thank you for your feedback!

Power Electronics 2

1. Maximum firing angle possible in an RC firing circuit is

2.

What first name or nickname would you like us to use?

2. For a pure DC with no harmonics:

3. Thyristor can turn OFF by which of the following NOTE: many answers may exist

4. Initially @ t=0 V=Vmax, I=0 And at t=t1 V=Vmax, I=Imax And at t=t2 V=0, I=Imax Assuming the rise and fall to be linear, which of the following are correct

5. Which of the following is a manufacturer specified Thyristor rating

6. If drift region region in a power devise is increased, then NOTE: many answers may exist

7. Which of the following is/are voltage commutation

8. Switching frequency of a power electronic devise is mostly affected by:

9. Match the following

4. Initially @ t=0

V=Vmax, I=0

And at t=t1

V=Vmax, I=Imax

And at t=t2

V=0, I=Imax

Assuming the rise and fall to be linear, which of the following are correct