Physics (AS & A Level) · May / June 2026 · Paper 11 · Question 27

A string is stretched between a vibration generator and a fixed point. When the vibration generator is vibrating at a frequency f, a stationary wave with five nodes is created on the stretched string, as shown. There is a node at the end of the string that is attached to the vibration generator. The frequency of vibration of the vibration generator is slowly increased. What is the next frequency that produces a stationary wave on the string?

1. A1.25f
2. B1.50f
3. C1.75f
4. D2.00f

As printed in the paper