Trial Quiz

Which component is essential for impedance matching in transformer-coupled amplifiers?

• Capacitor

• Resistor

• Transformer

• Diode

What is the primary function of a comparator?

• To filter high-frequency noise

• To compare two voltages and output a digital signal

• To provide negative feedback

• To act as an oscillator

Which class of amplifier is commonly used in audio applications due to its low distortion?

• Class B

• Class C

• Class A

• Class D

What is the main advantage of a Class D amplifier?

• Low distortion

• High efficiency (near 100% theoretically)

• Simple design

• Wide bandwidth

Which type of feedback stabilizes gain and reduces distortion in amplifiers?

• Positive feedback

• Negative feedback

• Regenerative feedback

• No feedback