BJT and Amplifier Concepts Quiz

Which of the following is a feature of a Bipolar Junction Transistor (BJT)?

• It operates only with AC signals

• It has three terminals: emitter, base, and collector

• It works only in Common Base (CB) configuration

• It uses a single semiconductor material

In a PNP transistor, the majority charge carriers are:

• Electrons

• Holes

• Protons

• Neutrons

The relation between current gains in the Common Emitter (CE), Common Base (CB), and Common Collector (CC) configurations is given by:

• β = α * γ

• β = α / γ

• α = β * γ

• β = γ / α

Which of the following is NOT a characteristic of the common emitter (CE) configuration?

• High voltage gain

• High current gain

• High input impedance

• Inverted output

What is the purpose of the DC load line in a transistor circuit?

• To show the variation of input current

• To determine the range of output voltage

• To represent the relation between collector current and collector-emitter voltage

• To indicate the frequency response of the amplifier

The stability factor in transistor biasing is defined as:

• Ratio of output voltage to input voltage

• Ratio of change in collector current to change in base current

• Sensitivity of the transistor's operating point to temperature variations

• Ratio of base current to collector current

In an amplifier, what is the role of the transistor?

• To supply power to the circuit

• To amplify the input signal

• To convert AC signal into DC

• To provide feedback to the system

Which of the following statements is true for a single-stage RC-coupled amplifier?

• It has low input impedance and high output impedance

• The coupling is done through an inductor

• It uses capacitive coupling to connect stages

• It does not require any biasing

What is the frequency response of an amplifier?

• The ability to filter frequencies

• The range of frequencies the amplifier can effectively amplify

• The maximum frequency that can pass through the amplifier

• The amount of power consumed by the amplifier

Which biasing technique is commonly used in transistor amplifiers to maintain stability?

• Voltage divider biasing

• Fixed biasing

• Emitter biasing

• Base biasing