Neco 2020 Physics Question 42
Practice objective / multiple choice question 42 from the 2020 Neco Physics examination.
A string of length \(L = 1.2\ \text{m}\) is fixed at both ends. Its linear mass density is \(\lambda = 0.008\ \text{kg\,m}^{-1}\). When the string vibrates in its 23rd harmonic, the frequency observed is \(f = 1500\ \text{Hz}\). The tension in the string is then increased by 20\% and, at the same frequency, the string vibrates in its 21st harmonic. Find the original tension in the string (in newtons).
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About This Question
This is Neco 2020 Physics Question 42. It is one of the objective questions from the 2020 Neco Physics examination.
Difficulty level: Medium .
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