[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-427682-105":59,"doc-detail-427682-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","physics-booster-physics-exam-tip","Physics Booster - Physics - Exam tip","","Physics BOOSTER revision material focused on GCSE Physics essentials, combining quick-reference summaries with exam guidance. Covers core ideas including AC and DC behavior, rectifier circuits, acceleration (definition, equations, units, and positive/negative acceleration), atomic structure models and evidence, Brownian motion, capacitors and time-delay behavior, circular motion with centripetal force and orbital conditions, plus colour and communication concepts. Includes key formulae, comparative explanations (AM vs FM), and clear definitions for fast learning.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/physics-booster-physics-exam-tip/427682/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/physics-booster-physics-exam-tip/427682.png","ImageObject",300,407,{"name":92,"@type":93},"Aran","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-22","2026-09-29",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why do transformers only work with AC?","Question",{"text":112,"@type":113},"Transformers rely on the changing magnetic field produced by changing current, which occurs in AC. With DC there is no continuously changing field to induce the required effect.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How is acceleration defined and calculated in this revision?",{"text":117,"@type":113},"Acceleration is the rate of change of velocity. It is calculated using acceleration = change in velocity / time taken, and given as a = (v - u) / t with unit m/s².",{"name":119,"@type":110,"acceptedAnswer":120},"What is the centripetal force and how does it relate to circular motion?",{"text":121,"@type":113},"Centripetal force acts towards the centre because an object moving in a circle is constantly changing direction and therefore continually accelerating. The revision links it to centripetal acceleration v²/r and force mv²/r, and notes that gravity provides it for orbits.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},427682,1790823039,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":145},137455076865,"https://ap-avatar.wpscdn.com/davatar_29158cc5080c5b710cf443261637dec0","PhysiGS  \nBOOSTER  \nBOOSTER  \n# Physics\n\n·A-Z approach  \n● The essential facts  \n·Quick and easy to use  \n=current yvoltage(8  \n/  \nREVISION  \nGCSE  \nPHYSICSBooster  \nFirst published 2000exclusively for WHSmith by  \nHodder &Stoughton Educational338 Euston RoadLondon NW13BH  \nText and illustrations Hodder&Stoughton Educational 2000  \nllustrations on pages4(top left),7(middle),10(both),11(two at top),16(bottom),18(top),19,25(top and bottom),32(top),33(topright),41(bottom),42(second bottom),45(bottom)◎Jim Breithaupt.  \nAllrights reserved.No part of this publication may be reproduced ortransmittedin any form orby any means,electronic or mechanical,including photocopying,recording orany information storage and retrieval system,without permissionin writing from the publisher.  \nA CIP record for this bookis available from the British Library.  \nText:Gill Brucellustrations:Tim OliverDeveloped and edited by Hart McLeod  \nISBN0340781289  \nImpression number 10987  \n200620052004  \nPrinted and bound by Hobbs The Printer,Totton,Hants  \nAC and DC  \nCurrent always flows from positive to negative.In DC-direct current-one side of the supply is alwayspositive and the other is always negative so currentalways flows the same way around the circuit.In AC-alternating current-the sides of the supply keepswapping between positive and negative so thecurrent keeps swapping direction.Batteries give DC;power stations make AC,so mains sockets give AC.  \n● Rectifier circuits change ACto DC.  \nAC can be representedgraphically by a sine wave  \n·Electronic circuits must have DC to work.  \n● Some motors work on DC and others work on AC.  \n# Exam tip\n\nTransformers only work with AC since they rely on the changing magnetic fieldthat the changing current produces.  \nAcceleration  \nAcceleration is rate of change of velocity-this means how quickly the velocityis changing.  \nacceleration=change in velocity/time taken  \na=(v-u)/t  \nUnit for acceleration is m/s².  \nThe velocity of an object is its speed and direction of movement,so accelerationoccurs when the object's speed and/or direction change;for example:  \n·startingto move·slowing down  \n·speeding up·stopping  \n·changing direction  \nSlowing down and stopping are sometimes called negative acceleration ordeceleration.  \nAcceleration is caused when an unbalanced force acts on an object.  \nacceleration =resultant force on object/mass ofobjecta=F/m  \nAtomic structure  \nThe Plum pudding model of the atom was changed to a nuclearmodel because of the evidence that α-particles mostly pass throughgold foil(so it contains lots of empty space)but sometimes reboundas if they have hit something heavy and positive.A nucleus withmore charge deflects α-particles more,and fasterα-particles aredeflected less.The current ideais that atoms consist of a nucleus,containing protons and neutrons,surrounded by electrons far away.  \nPlum pudding  \nmodel  \nparallel beam  \nof ca-particles  \n180°scattering  \n\n| particle  \u003Cbr>mass  \u003Cbr>charge   |\n| --- |\n| 1  \u003Cbr>+1  \u003Cbr>proton  \u003Cbr>0  \u003Cbr>1  \u003Cbr>neutron  \u003Cbr>electron  \u003Cbr>negligible  \u003Cbr>-1   |\n\nnuclear model  \n·Atomic number or proton number isnumber of protons;defines element.  \n·Mass number or nucleon number isnumber of (protons+neutrons).  \n·Isotopes have same atomic numberbut different mass numbers.  \nBrownian motion  \nSmoke is made of tiny pieces of solid;the separate pieces canbe seen under a microscope;they move in arandom,jerky way.This is called Brownian motion,and is evidence that the airaround the smoke consists of moving particles.The airparticles-molecules-are far too small to see but they pusharound the bits ofsmoke.  \nrandom motion of  \npieces of smoke  \nCapacitors  \nCapacitors can store charge.  \n(i)When the switch is closed,charge flowsonto Cso the voltage across Cincreases.  \n(ii)When the switch is closed,charge flowsoffCand so the voltage across C decreases.  \nIn both cases,the process takes longerif either or both of Rand Care larger.  \n(i)  \n(ii)  \n# Exam tip\n\nCapacitors","cbCaipHa0ubr4iwM","https://ap.wps.com/l/cbCaipHa0ubr4iwM","pdf",1942542,52,"English","# Physics\n## Exam tip\n## Acceleration\n## Atomic structure\n## Brownian motion\n## Capacitors\n## Exam tip\n## Circular motion\n## Exam tip\n## Colour\n## Communication (EDEXCEL only)","[{\"question\":\"Why do transformers only work with AC?\",\"answer\":\"Transformers rely on the changing magnetic field produced by changing current, which occurs in AC. With DC there is no continuously changing field to induce the required effect.\"},{\"question\":\"How is acceleration defined and calculated in this revision?\",\"answer\":\"Acceleration is the rate of change of velocity. It is calculated using acceleration = change in velocity / time taken, and given as a = (v - u) / t with unit m/s².\"},{\"question\":\"What is the centripetal force and how does it relate to circular motion?\",\"answer\":\"Centripetal force acts towards the centre because an object moving in a circle is constantly changing direction and therefore continually accelerating. The revision links it to centripetal acceleration v²/r and force mv²/r, and notes that gravity provides it for orbits.\"}]","Physics Booster - Physics - Exam tip | PDF",1790644558,131]