Amplifiers

📝 Additional Practice Questions (Exam-Style)

Group A: Objective type (1 Score Each)

1 What type of feedback is used in electronic amplifiers for gain stabilization?

2 State the mathematical formula used to calculate the operating bandwidth  of an amplifier circuit.

3 Which component in a Public Address (PA) system is responsible for converting electrical audio signals into mechanical sound waves?

4 Name the specific configuration of a BJT transistor that is most commonly utilized as a voltage amplifier.

Group B: Short Answer Questions (2 Scores Each)

5 In a single-stage CE amplifier, what are the specific functions of the input coupling capacitor and the output coupling capacitor ?

6 List the specific types of silicon integrated circuits (ICs) that are commonly deployed as dedicated audio amplifiers in modern sound systems.

7 Explain why an un-biased transistor fails to function effectively when handling weak signals in an amplifier circuit.

Group C: Essay & Schematic Questions (3 to 4 Scores Each)

8 Draw a clean, labeled circuit schematic for a Potential Divider Biased Common Emitter Transistor Amplifier. 

9 Describe what occurs inside a single-stage NPN Common Emitter amplifier circuit during the negative half-cycle of an input signal. Explain why this creates a positive phase swing at the output.

10 Elaborate on the structural and functional differences between a Voltage Amplifier and a Power Amplifier. Focus your comparison on output impedance levels, distortion levels, and their respective coupling networks.