6.18P explain the use of step-up different turns ratios with AC and step-down transformers in the voltmeters. Video clip: large scale generation and (a) transmission of electrical energy Demonstrations: Look at the structure of a 6.19P know and use the transformer, with laminated relationship between input core, thick wire coils, etc. (primary) and output (secondary) Show how the same voltages and the turns ratio for a transformer can be used as transformer: a step-up transformer or a input (primary) voltage / output step-down transformer when (secondary) voltage = primary used in reverse. turns / secondary turns Show how changing the Vp / Vs = np / ns ratio of primary to secondary turns affects the ratio of the primary to secondary 6.20P know and use the voltage. relationship: input power = output power Vp × Ip = Vs × Is for 100% efficiency. 49 Section 6: Revision exercises Edexcel International GCSE Consolidation and assessment Magnetism and Physics Student Book end of End of section test electromagnetism chapter checklists Edexcel International GCSE Physics Revision Guide Executive function Problem solving 50 Section 7: Students will be assessed on their Activity: Edexcel International GCSE Adaptability Executive function Radioactivity and ability to: Physics: Pages 199–206, 207 and Complete examples particles 232 including calculations to a) determine the number of Radioactivity b)
6.18P explain the use of step-up and step-down transformers in the large scale generation and transmission of electrical energy 6.19P know and use the relationship between input (primary) and output (secondary) voltages and the turns ratio for a transformer: input (primary) voltage / output (secondary) voltage = primary turns / secondary turns Vp / Vs = np / ns 6.20P know and use the relationship: input power = output power Vp × Ip = Vs × Is for 100% efficiency. different turns ratios with AC voltmeters. Demonstrations: Look at the structure of a transformer, with laminated core, thick wire coils, etc. Show how the same transformer can be used as a step-up transformer or a step-down transformer when used in reverse. Show how changing the ratio of primary to secondary turns affects the ratio of the primary to secondary voltage. Video clip: (a) 49 Section 6: Magnetism and electromagnetism Consolidation and assessment Revision exercises End of section test Edexcel International GCSE Physics Student Book end of chapter checklists Edexcel International GCSE Physics Revision Guide 50 Section 7: Radioactivity and particles a) b) Radioactivity Students will be assessed on their ability to: Activity: Complete examples including calculations to determine the number of Edexcel International GCSE Physics: Pages 199–206, 207 and 232 Executive function Adaptability Problem solving Executive function