Power Electronics Quiz: Chapters 1-4

Which of the following devices is a unidirectional power switch?

• MOSFET

• Thyristor

• Diode

• IGBT

Which device is known for having high switching speed and is used in high-frequency applications?

• Thyristor

• MOSFET

• SCR

• TRIAC

The primary difference between an IGBT and a MOSFET is in their ability to handle:

• Power loss

• High voltage

• Temperature variations

• Gate drive

Gate drive circuits are needed to control the operation of:

• Thyristors

• MOSFETs

• IGBTs

• All of the above

Which of the following devices requires a separate commutation circuit for turning off?

• MOSFET

• IGBT

• Thyristor

• Diode

The I-V characteristics of a thyristor show that it can conduct in the forward direction only when the gate is:

• Positive

• Negative

• Zero

• Reverse-biased

The firing angle of a thyristor is defined as the angle at which the gate pulse is applied to turn it on during:

• Positive half-cycle

• Negative half-cycle

• Both half-cycles

• During zero crossing

Which of the following power switching devices can block both forward and reverse voltage?

• Thyristor

• Diode

• IGBT

• MOSFET

MOSFETs are commonly used in switching applications because they have:

• Low gate drive requirements

• High switching speed

• Low conduction loss

• All of the above

Which of the following is true for the operation of IGBTs? (MSQ)

• They combine the advantages of MOSFET and BJT.

• They can handle high currents like BJTs.

• They are used for low voltage, low power applications.

• They have a lower switching speed than MOSFETs.