A lightning rod with sharp tip reduces damage risk. Which one of the following is the primary reason for it?
- A. It attracts lightning directly.
- B. The sharp tip reduces the local electric field.
- C. It enhances field and promotes continuous corona discharge. ✓
- D. It repels charged clouds.
Correct Answer: C. It enhances field and promotes continuous corona discharge.
Explanation
The sharp tip of a lightning rod has a very high charge density, producing a strong electric field that ionizes the surrounding air and promotes continuous corona discharge to neutralize the charge.
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