Question
What electrical component is used to protect circuits from over-current?
Answer Options
- A) Fuse
- B) Thyratron
- C) Varactor
- D) All these choices are correct
Correct Answer: A
Explanation
The simplest and most common component used for over-current protection is the Fuse. A fuse contains a thin wire filament designed to melt and intentionally open the circuit if the current flow exceeds a predetermined safe value (T0A04).
This open circuit immediately removes power and prevents excessive current from destroying equipment or causing a fire. Fuses are a crucial, passive safety device installed in any power circuit to protect the downstream components.
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