Physics Grade 1 Quiz: Power Amplifiers and DC/DC Converters

What is the main characteristic of a Class A Power Amplifier?

• Digital signal processing

• Low power output

• Low efficiency

• High efficiency

How is the conduction angle of a Class A Power Amplifier defined?

• Angle for which the transistor remains in the reverse conducting state during one complete cycle of the input signal

• Angle for which the transistor remains in the conducting state during one complete cycle of the input signal

• Angle for which the transistor remains in the non-conducting state during one complete cycle of the input signal

• Angle for which the transistor remains in the saturation state during one complete cycle of the input signal

What is the main characteristic of a Class B Power Amplifier?

• High distortion

• High efficiency

• Low efficiency

• Low power output

What is the main characteristic of a Class AB Power Amplifier?

• Operates by using the characteristics of Class C amplifiers

• Operates by using both the characteristics of Class A and Class B amplifiers

• Operates by using only the characteristics of Class A amplifiers

• Operates by using only the characteristics of Class B amplifiers

How does a Class AB Power Amplifier improve efficiency compared to Class A and Class B?

• It uses only Class A operation

• It uses only Class B operation

• It reduces efficiency compared to Class A and Class B

• It uses a combination of Class A and Class B operation.

What are the differences between Class A, Class B, and Class AB Power Amplifiers?

• Speed, distance, and time

• Efficiency, linearity, and power dissipation

• Color, size, and weight

• Voltage, current, and resistance

What are the advantages and disadvantages of Class A, Class B, and Class AB Power Amplifiers?

• Class AB amplifiers are not suitable for audio applications

• Class B amplifiers have high distortion

• Class A amplifiers are the most efficient

• The advantages and disadvantages vary depending on the specific characteristics of each class of power amplifier.