Physics (AS & A Level) · Oct / Nov 2018 · Paper 12 · Question 27

Progressive sound waves of wavelength 20 cm enter the air columns in a closed pipe P and an open pipe Q. The lengths of the pipes are shown. In which pipe or pipes are stationary waves formed?

1. AP and Q
2. BP only
3. CQ only
4. Dneither P nor Q

As printed in the paper