Question
Which symbol in Figure G7-1 represents a solid core transformer?
Answer Options
- A) Symbol 4
- B) Symbol 7
- C) Symbol 6
- D) Symbol 1
Correct Answer: C
Explanation
A transformer is a device that transfers electrical energy from one circuit to another through magnetic coupling, using a primary and a secondary winding. The schematic symbol must indicate how the two windings are magnetically linked.
Symbol 6 represents a transformer with a solid core (or iron core). This is shown by the two parallel lines drawn between the primary and secondary windings. These lines indicate the presence of a ferromagnetic core material, which provides high magnetic coupling. In contrast, a transformer without these lines (an air-core transformer) is typically used in RF applications.
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