CUET · PHYSICS · PYQ PAPER 2025
The electromagnetic radiation used to kill germs in water purifiers is
- A Gamma rays
- B X - rays
- C Infrared rays
- D Ultraviolet rays
Answer & Solution
Correct Answer
(D) Ultraviolet rays
Step-by-step Solution
Detailed explanation
Ultraviolet (UV) rays are used in water purifiers because they possess enough energy to penetrate the cells of bacteria, viruses, and other microorganisms. This radiation disrupts their DNA/RNA, effectively killing them or preventing them from reproducing.
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