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（14.00分）如图是导轨式电磁炮实验装置示意图.两根平行长直金属导轨沿水平方向固定，其间安放金属滑块（即实验用弹丸）.滑块可沿导轨无摩擦滑行，且始终与导轨保持良好接触.电源提供的强大电流从一根导轨...
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高三下学期物理《2018年广东省惠州市高考物理模拟试卷（4月份）》真题及答案
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如图所示两根光滑金属导轨平行放置导轨所在平面与水平面间的夹角为θ整个装置处于沿竖直方向的匀强磁场中金
磁场方向竖直向上
磁场方向竖直向下
ab受安培力的方向平行导轨向上
ab受安培力的方向平行导轨向下
如图甲所示在两根水平放置的平行金属导轨两端各接一只R.＝1Ω的电阻导轨间距L.＝0.2m导轨的电阻忽
18分电磁炮是利用电磁力对弹体加速的新型武器具有速度快效率高等优点如图是电磁炮的原理结构示意图光滑水
如图两根细线分别系着A.B.两根磁铁磁极未画出细线另一端分别系在天花板的C.D.两处磁铁静止时情形如
如图所示两根光滑金属导轨平行放置导轨所在平面与水平面间的夹角为θ整个装置处于沿竖直方向的匀强磁场中金
磁场方向竖直向上
磁场方向竖直向下
ab受安培力的方向平行导轨向上
ab受安培力的方向平行导轨向下
中国电磁炮研制方面与欧美西方国家在同一起跑线上限于技术和人才原因中国电磁炮研制会稍比西方国家慢几年但
下图是导轨式电磁炮实验装置示意图两根平行长直金属导轨沿水平方向固定其间安放金属滑块即实验用弹丸滑块可
某科学的超电磁炮中炮姐放电磁炮需要的道具是
简述电磁炮的分类
电磁炮电磁炮是利用电磁发射技术制成的一种先进动能杀伤武器与传统大炮将火药燃气压力作用于弹丸不同电磁炮
如图所示水平放置的两根光滑平行金属导轨相距为d两根质量均为m的金属棒垂直于导轨平行放置在导轨上其中a
根据磁场对电流产生作用力的原理人们研制出一种新型的发射炮弹的装置﹣﹣电磁炮如图所示把待发炮弹放置在强
增大电流I的值
增大磁感应强度B的值
增大炮弹的质量
改变磁感应强度B的方向，使之与炮弹滑行方向平行
画出两根平行直导线当同一方向流过电流时导线受力的方向示意图
目前电磁武器主要分为和电磁炮两种
电磁流
电磁发射器
电磁枪
电磁火箭弹
如图所示MNPQ是两根足够长的固定平行金属导轨两导轨间的距离为l导轨平面与水平面夹角为θ在整个导轨平
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加速器
开关
能量调节器
电源
电磁炮是利用电磁发射技术制成的一种先进的武器具有速度快命中率高等优点.它的主要原理如图所示通电导体在
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EasterisaChristianholiday.ItisalsothemostimportantfestivalinwesterncountryjustbehindChristmasDay.EasterDayisonthefirstSundayafterthefullmooninlateMarchorearlyApril.ItissaidthatJesusdiedonFriday.Afterthreedayshebecamealiveagain.Hisresurrection复活iscelebratedonthatday.ForwesternerstherearemanyactivitiestocelebrateEasternow. Alllifecomesfromanegg.Longtimeagotheeggmeantspringandanewlife.AndnowtheeggmeansJesus'reborn.Eastereggscanbringhappinesstopeople.Childrenandtheirparentsoftencoloredeggs.Theseeggsaresymbolsofpeople'goodwishes. Asweknowbunnyisthemostfertility多产的animalsanditmeansthenewlifeinspring.Asmessengers报信员tosendeggsrabbitsarepopularwithchildren.OnEasterDaychildrenwillreceivegiftslikerabbits.SopeoplegivetherabbitsacutenamethatisEasterBunny.EggHuntingisagamethateggsarehiddeninsomeplacesforchildrentofind.ItissaidthatEasterBunnyhideggsintheroomorthegrassandletkidstofind.OnthatdayChildrenhuntfortheeggsallaroundthehouse.PeopleholdEasteregghuntsandthechildwhofindsthemosteggswinsaprize. OnEasterDaypeopleofteneatmeatmainlylambandham.Theyallhaveacertainmeaning.Lambmeansthedevotion献身toChrist.PeopleeatEasterbreadtoo.TheEasterbreadpaintedthewordsofcrossesinordertocommemorate纪念Christ. OnEasterDaypeopledressupandgoout.Theywalkaroundthetown.NowmanypeoplewalkinEasterparades游行toshowandseenewspringclothesespeciallyhats.Thenewclothesareasymbolofnewlife. WhenpeoplemeetonEastertheyoftengreeteachotherwith“HappyEaster!TheLord'srisen!” 根据短文内容判断正T误F. 81.ChristmasDayismoreimportantthanEasterinwesterncountry. 82.EasterDayisonthefirstSaturdayafterthefullmooninlateMarchorearlyApril. 83.Whenchildrenplayegghuntingthechildwhofindsthemosteggswinsaprize. 84.OnEasterDaypeopleonlyeatlambhamandbreadwithwordsofcrosses. 85.ManypeoplewalkinEasterparadestoshowandseenewspringclothesbecausetheyarealsoasymbolofnewlife.
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高三下学期物理
高三上学期物理
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