Deep Dive: E7B12
The correct answer is C: Common emitter. What type of amplifier circuit is shown in Figure E7-1 is common emitter. Common emitter has input on base, output on collector, emitter common. For amateur radio operators, this is important for amplifier knowledge. Understanding this helps when analyzing amplifier circuits.
Why Other Answers Are Wrong
Option A (Common base): Incorrect. Common base isn't the type - Figure E7-1 shows common emitter. Common base isn't the type. Option B (Common collector): Incorrect. Common collector isn't the type - Figure E7-1 shows common emitter. Common collector isn't the type. Option D (Emitter follower): Incorrect. Emitter follower is common collector, not common emitter - Figure E7-1 shows common emitter. Emitter follower isn't the type.
Exam Tip
Amplifier circuit in Figure E7-1 = common emitter. Think 'C'ommon 'E'mitter = 'C'ollector output, 'E'mitter common. Common emitter has input on base, output on collector, emitter common. Not common base, not common collector (emitter follower), not emitter follower - just common emitter.
Memory Aid
Amplifier circuit in Figure E7-1 = common emitter. Think 'C'ommon 'E'mitter = 'B'ase input, 'C'ollector output. Common emitter has input on base, output on collector, emitter common. Important for amplifier knowledge.
Real-World Example
The amplifier circuit shown in Figure E7-1: It's a common emitter amplifier. The input is on the base, output is on the collector, and the emitter is common (grounded or bypassed). This is the type - common emitter.
Source & Coverage
Question Pool: 2024-2028 Question Pool
Subelement: E7B
Reference: 2024-2028 Question Pool · E7 - Practical Circuits
Key Concepts
Official Pool Source
Question text and answer key are synchronized with the current NCVEC Extra Class pool and mapped to the E7B topic.