Post-UTME Physics 2018 Objective — Question 5
Question 5 of 20 from the Post-UTME Screening (Post-UTME) Physics 2018 Objective paper, with the correct answer and a full explanation.
Advertisement
The sound of an electric bell cannot be heard if it is kept in an evacuated jar because the
- A. sound cannot pass through the walls of the jar
- B. sound cannot travel through the vacuumCorrect
- C. vibration of the bell cannot take place in vacuum
- D. ear cannot detect the sound which has passed through the vacuum
Explanation
Sound is a mechanical wave and requires a medium; it cannot travel through the vacuum inside the evacuated jar.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.