Quelpr
3 marksProperties of Waves

CAPE Physics Unit 1 · 2008 · Paper 2 · Question 2(b)(iii)

An apparatus shown in Figure 1 is used to investigate waves on strings. It consists of a signal generator, vibrator, string of length 2.76 m, pulley, and weight.

Write an equation for the wavelength when the string has n anti-nodes and use this to show that the relationship between the frequency of the vibrator and the number of anti-nodes is f = (v/2L)n where v is the wave velocity and L (= 2.76 m) is the length of the string.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)Explain how a stringed instrument such as a guitar produces a musical note.[2 marks]
  2. 2(b)The apparatus shown in Figure 1 may be used to investigate waves on strings.[1 mark]
  3. 2(b)(i)By varying the setting on the signal generator a standing wave with 3 anti-nodes may be set up on the string. In the space below draw a diagram to show how the…[1 mark]
  4. 2(b)(ii)Calculate the wavelength of the wave you have drawn.[1 mark]
  5. 2(c)The data in the Table 2 were collected using the apparatus in Figure 1 on page 7. By means of plotting a suitable graph on page 8, find the velocity of the…[5 marks]

More practice: the rest of this paper · more Properties of Waves questions · all CAPE Physics Unit 1 past papers