Transistor as an Amplifier Quiz

What is the primary function of a transistor when used as an amplifier?

• To decrease current

• To decrease voltage

• To increase current

• To increase voltage

How does the collector current (IC) compare to the base current (IB) in a transistor?

• IC is always greater than IB

• IC is equal to IB

• IC is unrelated to IB

• IC is always less than IB

What happens to the collector current (IC) when the base current (IB) increases?

• IC remains the same

• IC decreases

• IC becomes zero

• IC increases

What is the amplification factor in a transistor?

• The ratio of voltage to current

• The ratio of IC to IB

• The ratio of IB to IC

• The ratio of power to resistance

How can the amplification factor be determined from a graph?

• By measuring the slope of the graph

• By measuring the area under the graph

• By measuring the intercept of the graph

• By measuring the curvature of the graph

What is the role of capacitors in an amplification circuit?

• To allow direct current to pass

• To block alternating current

• To allow alternating current to pass

• To increase voltage

Why is a capacitor used in the microphone circuit?

• To decrease the current

• To increase the sound

• To prevent direct current from entering the microphone

• To convert sound to electrical energy

What does a microphone do in an amplification circuit?

• Converts sound energy to electrical energy

• Converts electrical energy to sound

• Increases the sound

• Decreases the current

What is the function of a speaker in an amplification circuit?

• To convert electrical energy to sound

• To convert sound to electrical energy

• To increase the current

• To decrease the voltage

How does the sound produced by the speaker compare to the original sound?

• It is quieter

• It is louder

• It is the same

• It is distorted