audio amp

What is the primary function of an amplifier?

• To convert AC signals to DC signals.

• To increase the amplitude of electrical signals.

• To reduce the frequency of electrical signals.

• To generate new electrical signals.

What is the phase relationship between the input and output signals in a basic common-emitter Class A amplifier circuit (before adding emitter feedback)?

• 0-degree phase shift

• 90-degree phase shift

• 180-degree phase shift

• 270-degree phase shift

Why is a resistor added between the emitter and ground in a Class A amplifier circuit?

• To increase the overall gain of the amplifier.

• To provide positive feedback to the input.

• To limit the gain and provide negative feedback.

• To block AC signals from reaching the ground.

What is the purpose of adding a capacitor at the input of a Class A amplifier circuit?

• To increase the DC bias of the input signal.

• To block AC signals from the input source.

• To allow only DC signals to pass through.

• To block DC from the input source and allow AC to pass.