如图所示电路,闭合开关发现两灯泡均不亮.于是小文用一根导线检查故障.①闭合开关,将导线连接在a、b之间,发现两灯不亮;②械命盾体单次同下谓基先闭合开关,将导线连在b、c间,两灯仍不亮;③闭合开关,将导线连在c、d间,左灯亮、右灯不亮.根据以上操作分析:电路故障出现在______;故障是______.能否把导线连在a、d间
试题答来自案:闭合开关,灯泡不亮要么短路、要么断路;①闭合开关,将导线连接在a、b之间,发现两灯不亮,则左面的灯不存在断路;②闭合开关,360问答将导线连在b、c间,两灯仍不亮,...
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一个小灯泡和导线,让小灯泡亮起来,有几种连接方法
试题**:D试题解析:分析:手电筒的小灯泡不亮,有两种情况:①电路中某处断路,②灯被短路.据此分析判断.解答:A、灯丝断了,是发生断路;B、开关处出现断路,是发生断路;C、小灯泡...
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利用干电池、导线、小灯泡、电动机、铅笔芯、橡皮、塑料尺探究:
D解析:[解答]由干电池、导线、来自小灯泡、铅笔芯、360问答橡皮和塑料尺可完成实验(1);由干电池、导线和电动机可完成实验(2);由导线、小灯泡和电动机可完成实验(3);由干电...
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将电能变换成其他能量的电路组成部分称为( )。A.用电器B.导线C.电源D.开关请帮忙给出正来自确**和分析,谢谢!要限法为供解策节律政散
正确**:A
平行通电直导线之间的相互作用为什么是**相吸异性相斥,最好带上受力分析等详细解答,谢谢!
这是同向通电指导线的,用两色表示不同导线及其产生的磁场方向示意图,用左边的导线举例,是×场,用左手定则可知受力方向向左,而右边是点场,左手定则,受力向右
废弃的铁制品、铝制易拉罐、铜导线应归入的属类是( )
C解析:根据已有的知宽植稳友延修清入练胞识进行分析,废弃的铁制品、铝制易拉罐、铜导线属于金属材料,据此解答.
【题文】(10分)如图所示,电阻为R来自的长直螺线管,其两端通过电阻可忽略的导线相连接。一个质量为m的小条形磁铁A从静止开始落入其中,经过一段距离后以速度速v做匀速运动。假设小磁铁在下360问答落过程中始终沿螺线管的轴线运动且无翻转。(1)定性分析说明:小磁铁的磁性越强,最后匀速运动的速度就越小;(2)小磁铁做匀速
试题**:【**】(1)见解析(2)试题解析:【解析】试题分析:(1)根据楞次定律,小磁铁的磁性越强,通过导线环的磁通量的变化率越大,因此下落过程中在导线环中产生的感应电流越大顾...
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【题来自文】(10分)如图所示,电阻为R的长直螺线管,其两端通过电阻可忽略的导线相连接。一个质量为m的小条形磁铁A从静止开始落入其中,经过一段距离后以速度v做匀速运动。假设小磁铁在下落过程中始终呢送破院带么沿螺线管的轴线运动且无翻转。(1)定性分析说明:小磁铁的磁性越强,最后匀速运动的速度就越小;(2)小磁铁做匀速
试题**:【**】(1)见解析(2)试题解析:【解析】试题分析:(1)根据楞次定律,小磁铁的磁始帝志附性越强,通过导线环的磁通量的初方但危落和变化率越大,因此下落过程中在导线环中...
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【题文】如图,用丝线悬挂于一点、可**转动的通电直导线AB ,在将电键K接通的瞬间,下列判断正确的是A.通电直导线AB,A端向上,B端向下,悬线张力不变B.通电直导线AB,A端向下,B端向上,悬线张力不变C.通电直导线AB,A端向纸外,B端向来自纸内,悬线张力变小D.通360问答电直导线AB,A端向纸内,B端向纸
试题答案:【答案】D试题解析:【解析】试题分析:根据图示可知附向将电键K接通的瞬间,马蹄形软磁体左侧将形成N极、右侧将形成S极,根据该磁场分布可判断出通电直导线AB受力情况,A端...
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相邻两杆塔导线悬挂点连线中点对导线的铅垂距离称为弧垂。( )请帮忙给出正确**和分析,谢谢!
正确**:√
相邻两杆塔来自导线悬挂点连线的中点对导线铅垂距离称为()怀激村鲜财手肥同歌A.档距B.爬距C.安全距离D.弧垂请帮忙给出正确**和分析,谢谢!
正确**:D
如图所示,连接灯客深农亚粉迅克左律泡的导线某处绝缘层破损且相碰,这时灯泡会( )
D解析:[解答]连接灯泡的导线由于绝缘皮破损,使火线和零线直接连通,即造成短路,此时电流不经过用电器,直接从火线回到零线上,故此时灯泡不发光;此时短路,干路电流变大,大于保演烧险...
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如判断导线中是否有直流电流通过,手边若有下列几组器材,其中可行的是A.小灯泡及导线B.玻璃棒及细棉线C.带电的小纸球及细棉线D.被磁化的缝衣针及细棉线
试题**:D试题解析:分析:根据电流的磁效应,干刚县电流产生的磁场能使小磁识静针偏转.解答:一段导线中是否有直流电流通过,可用细棉线把被磁化的缝衣针从中间吊起来,靠近电线,若靠近...
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