Physics Quiz: Power Amplifiers and DC/DC Converters

What is the temperature effect on a MOSFET?

• As the temperature increases, the threshold voltage increases and the drain current decreases.

• As the temperature increases, the threshold voltage decreases and the drain current increases.

• The temperature has no effect on a MOSFET.

• As the temperature increases, the threshold voltage remains constant and the drain current decreases.

How does the temperature affect the performance of a MOSFET?

• The performance of a MOSFET increases as temperature increases.

• Temperature has no effect on the performance of a MOSFET.

• The performance of a MOSFET decreases as temperature increases.

• The performance of a MOSFET is not affected by temperature.

Explain the concept of Class AB Power amplifier using MOSFET in simple terms.

• It is a type of amplifier that uses only Class A features

• It is a type of amplifier that uses only Class C features

• It is a type of amplifier that combines the features of Class A and Class B amplifiers.

• It is a type of amplifier that uses only Class B features

What are the advantages of using MOSFET in a Class AB Power amplifier?

• MOSFETs have low input impedance, low output impedance, and low switching speed.

• MOSFETs have high input impedance, low output impedance, and high switching speed.

• MOSFETs have low input impedance, high output impedance, and low switching speed.

• MOSFETs have high input impedance, high output impedance, and low switching speed.

What are the disadvantages of using MOSFET in a Class AB Power amplifier?

• Higher cost, complexity in driving the MOSFET, and potential for thermal runaway

• Less complexity in driving the MOSFET, lower cost, and no risk of thermal runaway

• Lower cost, simplicity in driving the MOSFET, and no potential for thermal runaway

• No disadvantages, easy to use, and low maintenance

How does the temperature affect the efficiency of a Class AB Power amplifier using MOSFET?

• It has no effect on the amplifier efficiency

• It affects the biasing and conduction angle of the amplifier.

• It decreases the distortion in the amplifier

• It increases the power output of the amplifier

Explain the role of MOSFET in a DC/DC converter.

• MOSFET acts as a switch to control the flow of current in a DC/DC converter.

• MOSFET is responsible for converting AC to DC in a DC/DC converter.

• MOSFET acts as a temperature sensor in a DC/DC converter.

• MOSFET plays a role in amplifying the power output of a DC/DC converter.

What are the key characteristics of a MOSFET in a DC/DC converter?

• High on-resistance, high switching speed, and high gate drive power

• Low on-resistance, high switching speed, and low gate drive power

• Low on-resistance, low switching speed, and high gate drive power

• High on-resistance, low switching speed, and high gate drive power