JAMB Physics 2008 Objective — Question 29
Question 29 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2008 Objective paper, with the correct answer and a full explanation.
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29. When the length of a vibrating string is reduced by one-third, its frequency becomes
- A. three times its former valueCorrect
- B. twice its former value
- C. one-third of its former value
- D. one-sixth of its former value
Explanation
Frequency of a vibrating string is inversely proportional to its length (F ∝ 1/l). Reducing the length correspondingly raises the frequency; per the source calculation, it becomes three times its former value.
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