- 问题详情:如图所示,电场中有A、B两点,则下列说法中正确的是()A.电势φA>φB,场强EA<EBB.电势φA<φB,场强EA>EBC.将+q从A点移动到B点,静电力做正功D.将﹣q分别放在A、B两点时具有的电势能EpA>EpB【回答】解:AB、电场线越密的地方电场强度越大,所以场强EA>EB,沿着电场线电势一定降低,所以电势∅A>∅...
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- 问题详情:如图所示为点电荷Q的电场中的三条电场线,下列说法正确的是( )A.若Q为负电荷,EA<EBB.若Q为负电荷,EA>EBC.若Q为正电荷,EA<EBD.若Q为正电荷,EA>EB【回答】BD【详解】由于不知道电场线的方向,所以不能判断该电场是正电荷还是负电荷产生的,但是无论是正电荷还是负电荷,都是A点的电场...
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- Thedryfootprintsattheebbofthetidemaybemarkedwithsunshineorhaze.ItwasclearthattheVarnumfortuneswereattheebb,butthetwowomendidwhattheycouldtopreserveadecentdignity.AnalysesofthevelocitydataatNo.14StationofChengjiawuchannelfortwotidalperiodsshowthatthee...
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- Hisinfluenceisontheebb.Asthatstartedtoebb,Islowed.Thefloodandebbtidesalternateswitheachother.Freshordersfortheworld'sshipyardsareatalowebb.Thereisanaturalebbandflowofenergythroughouttheday.I'veaddedrackadaptersformongrel,eventedmongrel,thin,ebbandw...
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- Wesawthespringebbtide.Onthebeachaftertheebbtide,themulticoloredshellsareeverywhere.InLujiangCounty,amanofloftyidealshasnotgonethroughtheebbtide,buthestilldoesnotknowwhoisahero.Perhapsthisisanoutcomethatisdoomedtonoanswer.Atthisebbtide,theriverflowsla...
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- 1、TheoceansebbandflowforYou.2、Theebbandflowofyourlifemirrorstheebbandflowofalllife.3、Lifeisebbandflow,giveandreceive.4、Shewassufferingamysteriousebbandflowofmood5、Isawtheebbandflowofthesea.6、It'saboutlifestyleandideas,peopleandmanners,thingsth...
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- 问题详情:A、B两电源分别供电时其特*曲线如图所示,则下述正确的是()A.电源电动势EA=EBB.电源内阻rA=rBC.外电路电阻相同时,电源B的输出功率较大D.总电流相同时,电源A输出功率较大【回答】解:由闭合电路欧姆定律得U=E﹣Ir,当I=0时,U=E,U﹣I图线的斜率等于电源内阻大小.A、由图看出,A的电动势为...
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- 问题详情:如图所示,是一*正点荷形成电场中的一条电场线,线段AB=BC,则()A.电场强度比较是EA>EBB.电势比较是φA<φBC.电势差比较是UAB>UBCD.检验电荷沿AC方向移动电场力不做功【回答】解:A、由题意,该电场是正点电荷产生,则知该正点电荷必定在A的左侧,A点离正点电荷最近,场强最大,故EA>EB.故A正...
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- 问题详情:如图所示,电场中有A、B两点,则下列说法正确的是()A.电势φA>φB,场强EA<EBB.电势φA<φB,场强EA>EBC.将+q电荷从A点移到B点电场力做负功D.将-q电荷分别放在A、B两点时具有的电势能EpA<EpB【回答】D知识点:电势能和电势题型:选择题...
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- 问题详情:如图所示的电场中有A、B两点,下列判断正确的是()A.电势φA>φB,场强EA>EBB.电势φA>φB,场强EA<EBC.将电荷量为q的正电荷从A点移到B点,电场力做正功,电势能减少D.将电荷量为q的负电荷分别放在A、B两点,电荷具有的电势能EpA>EpB【回答】*:BC解析:顺着电场线电势逐渐降低,即φA>...
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- It'saboutlifestyleandideas,peopleandmanners,thingsthatebbandflow.Thatebbtideisfullofdustfootprints,leavingsomesand,whereyoumayburythemostforthrightwounds....
- 8400
- Andasnoonapproaches,thetidebeginstoebbaway.Ittookmorethan10,000yearsofdomesticationforhumanstocreatethevastbiodiversityinourfoodsupplythatwe'renowwatchingebbaway.Asthedayworeon,thelife-bloodseemedtoebbawayfromUrsula,andwithintheemptinessaheavydespai...
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