[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207885-en":3,"doc-seo-207885-105":30,"detail-sidebar-cat-0-en-105":90},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},207885,962085564549,"Aditya","https://ap-avatar.wpscdn.com/davatar_085a072bc5b1113ac321206ff7593b45",4,"Exam","Transformers - Question Paper - P3 (IGCSE Physics 4403, AQA)","Physics IGCSE Question Paper focused on Transformers (Unit P3, Topic: Keeping Things Moving) for subject Physics 4403 under AQA. The assessment covers labeling transformer coils, turn calculations using potential differences, explaining why step-up transformers are used in power stations, and comparing switch mode transformers with traditional designs. Additional sections address AC generators, induced effects, graph transformations including reversed magnetic field and half-wave rectification, and circuit calculations involving potential difference and resistance.","Transformers  \nQuestion Paper  \n\n| Level | IGCSE |\n| --- | --- |\n| Subject | Physics (4403) |\n| Exam Board | AQA |\n| Unit | P3 |\n| Topic | Keeping Things Moving |\n| Sub-Topic | Transformers |\n| Booklet | Question Paper |\n\nTime Allowed: 58 minutes  \nScore: /58  \nPercentage: /100  \nGrade Boundaries:  \nQ1.Transformers are used to change potential differences (p.d. ) in the National Grid.  \nFigure 1 shows a step-up transformer that is used at a power station.  \n(a) (i) Use words from the box to label Figure 1.  \nInput p.d. Iron core Output p.d.  \nPrimary coil Secondary coil  \n(4)  \n(ii) One of the coils in Figure 1 has a p.d. of 25 kV across it and has 1000 turns.  \nThe other coil has a p.d. of 400 kV across it.  \nCalculate the number of turns on this other coil.  \nUse the correct equation from Section C of the Physics Equations Sheet.  \n\n|  |\n| --- |\n|  |\n\n...............................................................................................................  \nNumber of turns = ........................................  \n(2)  \n(iii) Explain why a step-up transformer is used at a power station.  \n\n|  |\n| --- |\n|  |\n|  |\n|  |\n|  |\n\n(3)  \n(b) Figure 2 shows a mobile phone charger.  \nThe charger contains a step-down transformer. A switch mode transformer is used rather than a traditional transformer.  \nDescribe the advantages of using a switch mode transformer in the charger rather than a traditional transformer.  \n\n|  |\n| --- |\n|  |\n|  |\n|  |\n|  |\n\n(3)  \n(Total 12 marks)  \nQ2.The diagram shows an a.c. generator.  \nThe coil rotates about the axis shown and cuts through the magnetic field produced by the magnets.  \n(a) (i) A potential difference is induced between X and Y.  \nUse the correct answer from the box to complete the sentence.  \nelectric generator motor transformer  \nThis effect is called the   ................................................. effect.  \n(1)  \n(ii) What do the letters a.c. stand for?  \n................................................................................................................  \n(1)  \n(iii) Name an instrument that could be used to measure the potential difference between X and Y.  \n(1)  \n(b) Graph 1 shows the output from the a.c. generator. Graph 1  \n(i) One of the axes on Graph 1 has been labelled ‘Potential difference’. What should the other axis be labelled?  \n(1)  \n(ii) The direction of the magnetic field is reversed.  \nOn Graph 1 , draw the output from the a.c. generator if everything else  \nremains the same.  \n(2)  \n(iii) The output from the a.c generator is changed to be half-wave rectified.  \nDraw the half-wave rectified output on Graph 2.  \nGraph 2  \n(2)  \n(iv) State the name of a component that may be used for the half-wave  \nrectification of a.c.  \n(1)  \n(c) The number of turns of wire on the coil is increased. This increases the maximum induced potential difference.  \nState two other ways in which the maximum induced potential difference could be increased.  \n1 ......................................................................................................................  \n.........................................................................................................................  \n2 ......................................................................................................................  \n.........................................................................................................................  \n(2)  \n(Total 11 marks)  \nQ3.The current in a circuit depends on the potential difference (p.d. ) provided by the cells and the total resistance of the circuit.  \n(a) Using the correct circuit symbols, draw a diagram to show how you would connect  \n1.5 V cells together to give a p.d. of 6 V.  \n(2)  \n(b) Figure 1 shows a circuit containing an 18 V battery.  \nTwo resistors, X and Y, are connected in series.  \n• X has a resistance of 3 Ω .  \n• There is a current of 2 A in X.  \nFigure 1  \n(i) Calculate the p.d. across X.  \nUse the correc","cbCaitUqfSqJDV4J","https://ap.wps.com/l/cbCaitUqfSqJDV4J","pdf",587290,1,11,"English","en",105,"# Q1 Transformers\n## (a) Step-up transformer labeling and calculations\n## (b) Mobile phone charger and switch mode transformer advantages\n# Q2 A.C. generator and rectification\n## (a) Induced potential difference and instruments\n## (b) Graph tasks: axis labels, reversed field, half-wave rectification\n## (c) Increasing induced potential difference\n# Q3 Circuits and transformers\n## (a) Connecting cells to achieve required p.d.\n## (b) Series resistors: p.d. and total resistance\n## (c) Transformer input/output reasoning and current calculation\n# Q4 Coil and magnet with ammeter","[{\"question\":\"How do you label the primary and secondary coils on a transformer diagram?\",\"answer\":\"Use the given step-up transformer context to label the coils by their roles in input and output potential differences, typically matching the provided input p.d. to the primary coil and the output p.d. to the secondary coil.\"},{\"question\":\"Why is a step-up transformer used at a power station?\",\"answer\":\"A step-up transformer increases the potential difference for transmission, helping reduce the current required for a given power and improving efficiency over long distances.\"},{\"question\":\"What are the advantages of using a switch mode transformer in a mobile phone charger?\",\"answer\":\"A switch mode transformer is more suitable for chargers because it can improve efficiency, reduce size/weight, and better match power conversion needs compared with a traditional transformer.\"}]","Transformers - Question Paper - P3 (IGCSE Physics 4403, AQA) | PDF",1788601600,28,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":85,"head_meta":87,"extra_data":89,"updated_unix":28},"transformers-question-paper-p3-igcse-physics-4403-aqa","",{"@graph":36,"@context":84},[37,53,67],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/transformers-question-paper-p3-igcse-physics-4403-aqa/207885/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":61,"encodingFormat":60,"isAccessibleForFree":62,"interactionStatistic":63},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-05",true,{"@type":64,"interactionType":65,"userInteractionCount":4},"InteractionCounter",{"@type":66},"ViewAction",{"@type":68,"mainEntity":69},"FAQPage",[70,76,80],{"name":71,"@type":72,"acceptedAnswer":73},"How do you label the primary and secondary coils on a transformer diagram?","Question",{"text":74,"@type":75},"Use the given step-up transformer context to label the coils by their roles in input and output potential differences, typically matching the provided input p.d. to the primary coil and the output p.d. to the secondary coil.","Answer",{"name":77,"@type":72,"acceptedAnswer":78},"Why is a step-up transformer used at a power station?",{"text":79,"@type":75},"A step-up transformer increases the potential difference for transmission, helping reduce the current required for a given power and improving efficiency over long distances.",{"name":81,"@type":72,"acceptedAnswer":82},"What are the advantages of using a switch mode transformer in a mobile phone charger?",{"text":83,"@type":75},"A switch mode transformer is more suitable for chargers because it can improve efficiency, reduce size/weight, and better match power conversion needs compared with a traditional transformer.","https://schema.org",{"og:url":52,"og:type":86,"og:title":13,"og:site_name":58,"og:description":14},"article",{"robots":88,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":91},[92,96,100,103,108,113,118,123,128,131,135],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":93,"show_sort_weight":94,"slug":95},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":97,"show_sort_weight":98,"slug":99},"Literature",80,"literature",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":101,"slug":102},70,"exam",{"id":104,"doc_module":4,"doc_module_name":46,"category_name":105,"show_sort_weight":106,"slug":107},5,"Comic",60,"comic",{"id":109,"doc_module":4,"doc_module_name":46,"category_name":110,"show_sort_weight":111,"slug":112},6,"Technology",50,"technology",{"id":114,"doc_module":4,"doc_module_name":46,"category_name":115,"show_sort_weight":116,"slug":117},7,"Healthcare",40,"healthcare",{"id":119,"doc_module":4,"doc_module_name":46,"category_name":120,"show_sort_weight":121,"slug":122},8,"Research & Report",30,"research-report",{"id":124,"doc_module":4,"doc_module_name":46,"category_name":125,"show_sort_weight":126,"slug":127},9,"Religion & Spirituality",20,"religion-spirituality",{"id":126,"doc_module":4,"doc_module_name":46,"category_name":129,"show_sort_weight":126,"slug":130},"World Cup","world-cup",{"id":132,"doc_module":4,"doc_module_name":46,"category_name":133,"show_sort_weight":132,"slug":134},10,"Lifestyle","lifestyle",{"id":136,"doc_module":4,"doc_module_name":46,"category_name":137,"show_sort_weight":104,"slug":138},19,"General","general"]