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P3 REVISION – CHAPTER 1 – Medical Application of Physics How are Ultrasound Waves used and what are the risks? Describe the properties and uses of Xrays What are the advantages and disadvantages of CAT scans? Draw a diagram of a converging lens going through a lens and a diagram of a diverging lens going through a lens. Label the two images What are the differences and similarities of a camera and the eye? What is meant by refraction? By which two equations can a refractive index be found? What is an endoscope? KEY WORDS: Ionising Interfaces Refracton Total Internal Reflection ASSESSMENT: P3 REVISION – CHAPTER 1 – Medical Application of Physics Continued How can you increase the amount light bends by? What is the equation for magnification? What is the focal length? Label the eye below with the functions of each thing you label What is the difference between a real and virtual image? What is Total Internal Reflection? In the diagram below draw a) angle of incidence less that critical angle b) equal to critical angle c) greater than critical angle KEY WORDS: ASSESSMENT: P3 REVISION – CHAPTER 2 – Moments What is a moment? What is hydraulic pressure? When are objects balanced in terms of moments? What is a leaver? What happens to pressure on a liquid? What is the equation for moments? What is the equation for pressure? What is centre of mass? What is centripetal force? What enables hydraulic systems to be force multipliers? Give three examples of centripetal force On a regular shape where is centre of mass? How can centre of mass be found on an irregular object? How can centripetal force be increased? Why does velocity change? ASSESSMENT: When is an object stable? For a simple pendulum: P3 REVISION – CHAPTER 3 – Keeping things Moving What is the motor effect? What is the left hand rule? How can you increase a motor’s speed? How can direction of Potential Difference be reversed? When will a conductor not experience a force? How can motors be made to turn faster? Why is an alternating current used instead of a direct current? What are transformers? What is a step up transformer? What is the equation for working out potential difference across a transformer? If transformers are assuemd to be 100% efficient which equation is used? What are switch mode transformers? What happens if a magnet is moved into a coil of wire? Advantages; Disadvantages: ASSESSMENT: What happens if an electrical conductor cuts through a magnetic field?