Igcse Model Questions Vol1 2021 Physics Question 19

Practice objective / multiple choice question 19 from the 2021 Igcse Model Questions Vol1 Physics examination.

Igcse Model Questions Vol1 2021 Physics Objective / Multiple Choice Medium Difficulty
Question 19 IGCSE_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • objective

A string of length \(1.20\ \text{m}\) is fixed at both ends. Its fundamental frequency is \(80\ \text{Hz}\). The tension in the string is then increased, raising the fundamental frequency to \(100\ \text{Hz}\). (i) By what factor does the tension increase? (ii) After the tension change, what is the frequency of the third harmonic of the string?

Answer Options

A. Tension increases by a factor of 2.00; third harmonic frequency = 320 Hz
Correct Answer B. Tension increases by a factor of 1.56; third harmonic frequency = 300 Hz
C. Tension increases by a factor of 1.56; third harmonic frequency = 280 Hz
D. Tension increases by a factor of 1.25; third harmonic frequency = 250 Hz
Correct Answer
B
Correct Option:
Tension increases by a factor of 1.56; third harmonic frequency = 300 Hz

About This Question

This is Igcse Model Questions Vol1 2021 Physics Question 19. It is one of the objective questions from the 2021 Igcse Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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