MCQ practice · SSC Physics Board questions · Chapter 7: Waves and Sound
For a mechanical wave, these take place:
- i. refraction
- ii. dispersion
- iii. superposition
Think it through first, then pick an option.
- a i and ii
- b i and iii
- c ii and iii
- d i, ii and iii
Answer and explanation
Correct answer: b i and iii
Refraction and superposition are both among the five characteristics. Dispersion is not in that list, so the board's answer is i and iii.
Why the other options are wrong
- a i and ii: i is true: refraction happens. But dispersion is not list of five characteristics, and superposition has been left out.
- c ii and iii: Refraction has been left out, yet it is list: a wave entering a second medium is refracted.
- d i, ii and iii: Not all three. In the board's scheme dispersion is outside the list, so ii is dropped.
Your account is open, so all 30,000+ MCQs from every chapter are yours. Start practising SSC Physics →
Want to keep going?
A free account carries you on to the next questions and opens 30,000+ MCQs from every chapter. Join before launch and Chirkut bundles are 60% off.
The ones you missed, worth one more look