Neco 2024 Physics Question 42

Practice objective / multiple choice question 42 from the 2024 Neco Physics examination.

Neco 2024 Physics Objective / Multiple Choice Medium Difficulty
Question 42 NECO • 2024 • PHYSICS • objective

A string of length \(1.20\,\text{m}\) is fixed at both ends. When a tension of \(80\,\text{N}\) is applied, the fundamental frequency of the string is \(120\,\text{Hz}\). The tension is then increased by \(20\,\text{N}\). \( (a) \) Find the linear mass density of the string. \( (b) \) Determine the frequency of the second harmonic after the tension increase.

Answer Options

A. Linear mass density = 1.10×10⁻³ kg m⁻¹; second‑harmonic frequency ≈ 2.45×10² Hz.
Correct Answer B. Linear mass density = 9.65×10⁻⁴ kg m⁻¹; second‑harmonic frequency ≈ 2.68×10² Hz.
C. Linear mass density = 9.65×10⁻⁴ kg m⁻¹; second‑harmonic frequency ≈ 2.90×10² Hz.
D. Linear mass density = 8.20×10⁻⁴ kg m⁻¹; second‑harmonic frequency ≈ 2.80×10² Hz.
Correct Answer
B
Correct Option:
Linear mass density = 9.65×10⁻⁴ kg m⁻¹; second‑harmonic frequency ≈ 2.68×10² Hz.

About This Question

This is Neco 2024 Physics Question 42. It is one of the objective questions from the 2024 Neco Physics examination.

Difficulty level: Medium .

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