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JAMB Physics 2014 Objective — Question 28

Question 28 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2014 Objective paper, with the correct answer and a full explanation.

The diagram shows a stationary wave of wavelength 40cm in a closed tube. The length L of the resonating air column is

Diagram for question 28

A. 10 cm
B. 20 cm
C. 30 cmCorrect
D. 40 cm

Explanation

For this stationary wave pattern, L = 3λ/4 = 3×40/4 = 30cm.

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