高考物理总复习-高中全程训练计划-物理-课练 28 带电粒子在复合场中的运动
课练28 带电粒子在复合场中的运动小题狂练○小题是基础 练小题 提分快1.[名师原创]关于通电直导线和通电线圈周围磁场的磁感线分布和磁场方向,不考虑地磁场影响,下列说法正确的是( )A.通电直导线周围的磁场方向可以用右手定则判断,顺着导线看去,磁感线可表示为以直导线为圆心的均匀分布的同心圆B.环形导线的磁场,可用安培定则判断,方法是让右手弯曲的四指与环形电流的方向一致,伸直的拇指所指方向即为环形导线轴线上的磁场方向C.从外部看,通电螺线管周围的磁场类似于条形磁铁的磁场,螺线管内部的磁场不能视为匀强磁场D.若把一个小磁针放在通电螺线管正上方中间位置,小磁针可能不与螺线管平行答案:B解析:通电直...
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