MCQ 11 Mark
In the experiment to show that a medium is necessary for propagation of sound, as the quantity of air inside the bell jar decreases, the level of ringing sound heard outside ……………… .
- Aincreases
- ✓decreases
- Cfluctuates randomly
- Dchanges at regular intervals
Answer
View full question & answer→Correct option: B.
decreases
In the experiment to show that a medium is necessary for propagation of , sound, as the quantity of air inside the bell jar decreases, the level of ringing sound heard outside decreases.