Post-UTME Physics 2008 Objective — Question 5
Question 5 of 10 from the Post-UTME Screening (Post-UTME) Physics 2008 Objective paper, with the correct answer and a full explanation.
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A sonometer wire of length 100cm under a tension of 10N has a frequency of 250Hz. Keeping the length of the wire constant, the tension is adjusted to produce a new frequency of 350Hz. The new tension is
- A. 5.1N
- B. 7.1N
- C. 14.0N
- D. 19.6NCorrect
Explanation
f∝√T, so T2=T1×(f2/f1)²=10×(350/250)²=19.6N.
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