6. Exam Questions: Edexcel A Level

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What measurements would you take, and how would you use them, to calculate the speed of soundin air?......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(4)Suggest why the minima detected near the sheet are much smaller than those detected nearthe loudspeaker...........................................................................................................................................................................................................................................................................................................................................................................................................................................(2)(Total 10 marks)<strong>6.</strong>4. (a) A student is given a ripple tank in which plane waves can be generated.Outline how the student could measure the wave speed v, the frequency f and the wavelength of the waves...………………………………………………………………………………………..………………………………………………………………………………………..………………………………………………………………………………………..………………………………………………………………………………………..………………………………………………………………………………………(6)(b)The speed of ocean waves in deep water is given by the relationship g2where g is the acceleration of free fall and is the wavelength of the waves.Derive an expression for T, the period of the waves, in terms of g and ...………………………………………………………………………………………..………………………………………………………………………………………..………………………………………………………………………………………(3)- 22 -
Calculate the value of T when the wavelength of the waves is 8.0 m...………………………………………………………………………………………..………………………………………………………………………………………T = …………………………………………………(1)(Total 10 marks)<strong>6.</strong>5. Complete the diagram below to show the different regions of the electromagnetic spectrum.Radio waves(2)State four differences between radio waves and sound waves.1. ……………………………………………………………………………………………2. ……………………………………………………………………………………………3. ……………………………………………………………………………………………4. ……………………………………………………………………………………………(4)Two radio stations broadcast at frequencies of 198 kHz and 95.8 MHz. Which station broadcasts atthe longer wavelength?………………………………………………………………………………………………Why do obstacles such as buildings and hills present less of a problem for the reception of thesignal from the station transmitting at the longer wavelength?………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………(3)(Total 9 marks)- 23 -
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6. Exam Questions: Edexcel A Level

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