AQA A Level Physics Paper 1 2019 Question Paper

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Two isotopes of iodine are 125 53 I and 131 53 I. Determine, for these two isotopes, the difference between the constituents of the nuclei. [1 mark] 0 1 . 2 A 131 53 I nuclide undergoes beta (�... �– ) decay to form a xenon nuclide. State the nucleon number of the xenon nuclide. [1 mark] 0 1 . 3 A 125 53 I nuclide decays by electron capture to form a tellurium nuclide. State two differences between the constituents of the iodine nucleus and the tellurium nucleus it decays into. [2 marks] Downloaded by: jessicaonyebuchi | [email protected] Distribution of this document is illegal Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides 3 *03* Turn over ► IB/M/Jun19/7408/1 Do not write outside the box 0 1 . 4 Internal conversion is a process in which a nucleus in an excited state can release its excess energy. In internal conversion all of the excess energy is transferred from the nucleus to an orbital electron through the electromagnetic force. This orbital electron is ejected from the atom. The tellurium nucleus formed in question 01.3 is in an excited state and can undergo internal conversion. Discuss three differences between internal conversion and beta (β– ) decay. [3 marks] 1 2 3 Turn over for the next question 7 Downloaded by: jessicaonyebuchi | [email protected] Distribution of this document is illegal Stuvia.co.uk - The Marketplace for Revision Notes & Study Guides 4 *04* IB/M/Jun19/7408/1 Do not write outside the 0 2 box Some cars are fitted with a water sensor designed to switch on windscreen wipers automatically when it rains. Figure 1 shows a simplified diagram of the sensor. Figure 1 A light ray travels from the light-emitting diode (LED) through the first prism and into the windscreen. The ray reflects off the surfaces of the windscreen at A, B and C and then passes through the second prism into the detector. 0 2 . 1 Suggest how the design ensures that there is no deviation of the ray as it enters the first prism. [1 mark] 0 2 . 2 Suggest two features of the design that ensure that there is no deviation of the ray as it leaves the first prism and enters the windscreen glass. [2 [Show More]

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