The diagram shows two tubes.
[Figure showing two tubes, X and Y. Tube X is closed at the bottom, open at the top. Tube Y is open at both ends.]
The tubes are identical except tube X is closed at its lower end while tube Y is open at its lower end. Both tubes have open upper ends.
A tuning fork placed above tube X causes resonance of the air at frequency f. No resonance is found at any lower frequency than f with tube X.
Which tuning fork will produce resonance when placed just above tube Y?

Q: What topic does this question test?

This question tests Waves in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Q: Which exam paper is this question from?

This question appeared in the Cambridge A-Level Physics Oct/Nov 2010 examination, Paper 1 Variant 2 (9702_w10_qp_12.pdf).

Question

The diagram shows two tubes.
[Figure showing two tubes, X and Y. Tube X is closed at the bottom, open at the top. Tube Y is open at both ends.]
The tubes are identical except tube X is closed at its lower end while tube Y is open at its lower end. Both tubes have open upper ends.
A tuning fork placed above tube X causes resonance of the air at frequency f. No resonance is found at any lower frequency than f with tube X.
Which tuning fork will produce resonance when placed just above tube Y?

Oracle Prep · Accepted Answer

The correct answer is D: fork of frequency 2f.

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