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PU CSS 2026 Waves Free Quiz 2

PU CSS Quiz

10:00

Answered: 0 / 9

Remaining: 9

Navigator 9 Q

General

General 9 MCQs

11. What happens to the observed frequency when a source approaches an observer?

A. Lower than the source frequency B. Higher than the source frequency C. Same as the source frequency D. Zero

12. How are standing waves formed?

A. Two waves traveling in opposite directions B. Two waves traveling in same direction C. A single wave reflecting D. Multiple waves of different frequencies

13. What is a node in a standing wave?

A. Point of maximum amplitude B. Point of zero displacement C. Point of maximum displacement D. Point of minimum displacement

14. What is an antinode in a standing wave?

A. Point of zero displacement B. Point of minimum displacement C. Point of maximum displacement D. Point of minimum amplitude

15. What is the distance between two consecutive nodes in a standing wave?

A. λ B. λ/4 C. 2λ D. λ/2

16. What is the frequency of the fundamental mode in a string fixed at both ends?

A. v/2L B. v/L C. 2v/L D. 3v/L

17. Why can resonance be dangerous?

A. Always beneficial B. Can be dangerous for structures C. Never occurs in nature D. Only occurs in sound

18. What happens when a tuning fork is placed near another tuning fork of the same frequency?

A. Tuning fork vibrates with any frequency B. Tuning fork stops vibrating C. Tuning fork changes frequency D. Tuning fork causes another fork of same frequency to vibrate

19. An open pipe resonates at fundamental frequency 343 Hz. What is its length? (Take v=343 m/s)

A. 0.5 m B. 1 m C. 0.25 m D. 2 m

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