MCQ
If frequency of a wave is $5\ Hz,$ then it is:
- AUltrasonics
- BMicrowaves
- ✓Infrasonics
- DRadio waves
Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than $20\ Hz$ or cycles per second, the "normal" limit of human hearing. So $5\ Hz$ is infrasonic.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.