Gce Model Questions Vol1 2022 Physics Question 48

Practice objective / multiple choice question 48 from the 2022 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2022 Physics Objective / Multiple Choice Medium Difficulty
Question 48 GCE_MODEL_QUESTIONS_VOL1 • 2022 • PHYSICS • objective

A string of length \(L=1.20\ \text{m}\) is fixed at both ends. Its fundamental frequency is \(120\ \text{Hz}\). When the tension in the string is increased by \(20\ \text{N}\), the frequency of the third harmonic becomes \(420\ \text{Hz}\). Assuming the linear mass density \(\mu\) remains unchanged, calculate (i) the original tension \(T\) in the string and (ii) the linear mass density \(\mu\). Give your answers to three significant figures.

Answer Options

A. T ≈ 48.0 N, μ ≈ 7.20×10⁻⁴ kg m⁻¹
B. T ≈ 55.4 N, μ ≈ 5.00×10⁻⁴ kg m⁻¹
C. T ≈ 62.5 N, μ ≈ 5.90×10⁻⁴ kg m⁻¹
Correct Answer D. T ≈ 55.4 N, μ ≈ 6.67×10⁻⁴ kg m⁻¹
Correct Answer
D
Correct Option:
T ≈ 55.4 N, μ ≈ 6.67×10⁻⁴ kg m⁻¹

About This Question

This is Gce Model Questions Vol1 2022 Physics Question 48. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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