Neco 2021 Physics Question 19

Practice objective / multiple choice question 19 from the 2021 Neco Physics examination.

Neco 2021 Physics Objective / Multiple Choice Medium Difficulty

Question 19 NECO • 2021 • PHYSICS • objective

A string of length \(0.60\,\text{m}\) is fixed at both ends. Its fundamental frequency at an initial tension \(T\) is \(40\,\text{Hz}\). When the tension is increased by 20 % (the new tension is \(12\,\text{N}\)), the frequency of the third harmonic is measured to be \(132\,\text{Hz}\). Determine the linear mass density \(\mu\) of the string in \(\text{kg·m}^{-1}\) (give your answer to three significant figures).

A. 4.34×10⁻² kg·m⁻¹

Correct Answer B. 4.34×10⁻³ kg·m⁻¹

C. 3.21×10⁻³ kg·m⁻¹

D. 5.12×10⁻³ kg·m⁻¹

Correct Answer

Correct Option:

4.34×10⁻³ kg·m⁻¹

This is Neco 2021 Physics Question 19. It is one of the objective questions from the 2021 Neco Physics examination.

Difficulty level: Medium .

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