1. A wave has a frequency of 450 Hz and a wavelength of 0.1 m. What is its speed? (v = f x lambda)
- A35
- B54.785
- C55
- D45
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Answer: D
Wave speed v = frequency x wavelength = 450 x 0.1 = 45 m/s.
Wave Motion — Physics Questions & Practice
Practise 305 Wave Motion questions from Physics for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.
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Practice questions on Wave Motion — with answers
Try each question first, then open the answer. Explanations are included.
2. A wave has a frequency of 470 Hz and a wavelength of 5 m. What is its speed? (v = f x lambda)
- A1764.09
- B2352
- C1772.959
- D2350
Show answer
Answer: D
Wave speed v = frequency x wavelength = 470 x 5 = 2350 m/s.
3. A wave has a frequency of 10 Hz and a wavelength of 5 m. What is its speed? (v = f x lambda)
- A40
- B50
- C45.105
- D51
Show answer
Answer: B
Wave speed v = frequency x wavelength = 10 x 5 = 50 m/s.
4. A wave has a frequency of 450 Hz and a wavelength of 1 m. What is its speed? (v = f x lambda)
- A450
- B460
- C373.677
- D401.645
Show answer
Answer: A
Wave speed v = frequency x wavelength = 450 x 1 = 450 m/s.
5. A wave has a frequency of 40 Hz and a wavelength of 0.5 m. What is its speed? (v = f x lambda)
- A19
- B16.84
- C18.332
- D20
Show answer
Answer: D
Wave speed v = frequency x wavelength = 40 x 0.5 = 20 m/s.
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