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class="pointer">高中物理</a> <span>/</span> <a href="javascript:;">多選題</a> </div> <div id="jph8qam" class="m-wrap g-cw cfx"> <div id="kh2n9ok" class="w fl"> <div id="yvbrg7h" class="g-mn2"> <ul id="J_question_detail" > <li> <div id="ayaiehk" class="question-block"> <div id="xkgv4kr" class="q-mc"> <h1 class="q-tit"> 1. <a href="/paper/view-5233491.shtml" class="ques-origin a-pointer" target="_blank"> (2023高二上·吉林期中) </a> 如圖，在一個邊長為a的正六邊形區(qū)域內(nèi)，存在磁感應(yīng)強(qiáng)度為B、方向垂直于紙面向里的勻強(qiáng)磁場，三個相同的帶正電粒子，比荷為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmrow%3E%3Cmtext%3Eq%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3Em%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"> ，先后從A點沿AD方向以大小不等的速率射入勻強(qiáng)磁場區(qū)域，已知粒子只受磁場的作用力，則（　?。?p><img width="170" height="144" src="http://tikupic.21cnjy.com/2023/11/27/64/0a/640a2c218bed80e8ddab5f2f8e909df7_196x166.png" style="max-width:100%;"></p> </h1> <div id="eu4b99j" class="exam-s"> <span id="fjnbybe" class="op-item"><span id="qixo8gc" class="op-item-nut">A . </span><span id="pvgf3ay" class="op-item-meat">從<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3EF%3C%2Fmtext%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">點飛出磁場的粒子速度大小為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmrow%3E%3Cmsqrt%3E%3Cmrow%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsqrt%3E%3Cmtext%3EB%3C%2Fmtext%3E%3Cmtext%3Eq%3C%2Fmtext%3E%3Cmtext%3Ea%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmtext%3Em%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="zanj2m5" class="op-item"><span id="lwlf0o2" class="op-item-nut">B . </span><span id="6zc3ffc" class="op-item-meat">所有從<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3EA%3C%2Fmtext%3E%3Cmtext%3EF%3C%2Fmtext%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">邊上飛出磁場的粒子，在磁場中的運動時間都相同</span></span> <span id="pt5ha1i" class="op-item"><span id="aq3t21z" class="op-item-nut">C . </span><span id="i6zmrnv" class="op-item-meat">從<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3EE%3C%2Fmtext%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">點飛出磁場的粒子，在磁場中的運動時間為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmfrac%3E%3Cmrow%3E%3Cmtext%3E%CF%80%3C%2Fmtext%3E%3Cmtext%3Em%3C%2Fmtext%3E%3C%2Fmrow%3E%3Cmrow%3E%3Cmn%3E3%3C%2Fmn%3E%3Cmtext%3EB%3C%2Fmtext%3E%3Cmtext%3Eq%3C%2Fmtext%3E%3C%2Fmrow%3E%3C%2Fmfrac%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> <span id="xzkbg4f" class="op-item"><span id="m3c7vzc" class="op-item-nut">D . </span><span id="2ic7xrd" class="op-item-meat">從<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3EE%3C%2Fmtext%3E%3Cmtext%3ED%3C%2Fmtext%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">邊上的某一點垂直<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmtext%3EE%3C%2Fmtext%3E%3Cmtext%3ED%3C%2Fmtext%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;">飛出磁場的粒子，其軌道半徑為<img class="mathml" src="http://math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmn%3E2%3C%2Fmn%3E%3Cmsqrt%3E%3Cmrow%3E%3Cmn%3E3%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmsqrt%3E%3Cmtext%3Ea%3C%2Fmtext%3E%3C%2Fmath%3E" style="max-width:100%;vertical-align: middle;"></span></span> </div> </div> </div> </li> </ul> <div style="height:20px;background-color: #fff;margin-top:1px"></div>  <div class="zruliv9" id="J_ConnectQuestionsdBox"> </div> </div> </div> <div id="uc2ygs2" class="g-sd2">  <div style="background:#fff;padding:20px 0;margin-bottom:20px;text-align:center;"> <img src="/question/paper-qrcode?id=55312184" width="140px" height="140px" alt=""> <p style="text-align:center;margin-top: 10px">微信掃碼預(yù)覽、分享更方便</p> </div> <div id="zrctmag" class="analyize-extend JV_question__papers"> <h3 class="extend-mt">使用過本題的試卷</h3> <ul class="extend-mc"> <li> <a href="/paper/view-5233491.shtml" 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