锟斤拷锟斤拷一锟斤拷锟脚堬拷锟斤拷 1锟斤拷锟脚堬拷锟侥伙拷锟斤拷锟斤拷锟絴(zh锟斤拷)锟斤拷锟脚堬拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫的磁極锟斤拷锟斤拷锟斤拷写艌锟斤拷锟斤拷锟斤拷锟斤拷锟�; 2锟斤拷锟斤拷锟紽锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷墚a(ch锟斤拷n)锟斤拷锟脚堬拷; 3锟斤拷锟脚極锟酵磁極之锟絞锟斤拷锟脚極锟斤拷锟斤拷锟街�锟絞锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟絞锟斤拷通锟絕锟脚堬拷锟絣(f锟斤拷)锟斤拷锟洁互锟斤拷锟斤拷; 4锟斤拷锟脚堬拷锟侥凤拷锟津：磁堬拷锟斤拷小锟斤拷針憋拷锟絆锟斤拷指锟斤拷锟斤拷锟皆擄拷c锟脚堬拷锟侥凤拷锟斤拷;

锟斤拷锟斤拷锟斤拷锟斤拷锟脚感撅拷锟斤拷锟节磁堬拷锟叫�锟揭伙拷l锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷@些锟斤拷锟斤拷锟斤拷每锟絚锟斤拷锟叫撅拷锟斤拷锟斤拷锟斤拷锟皆擄拷c锟侥磁堬拷锟斤拷锟斤拷; 1锟斤拷锟脚感撅拷锟斤拷锟剿傦拷?y锟斤拷u)锟斤拷锟斤拷锟斤拷锟斤拷艌锟斤拷锟斤拷藶锟斤拷锟絆(sh锟斤拷)锟侥撅拷; 2锟斤拷锟斤拷锟紽锟侥磁感撅拷锟斤拷锟斤拷锟解部锟侥憋拷锟絆锟斤拷锟较極锟斤拷锟斤拷(n锟斤拷i)锟斤拷锟斤拷锟较極锟斤拷锟斤拷锟絆;3锟斤拷锟脚感撅拷锟角凤拷锟絔锟斤拷锟斤拷;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟洁定锟絫锟斤拷 1锟斤拷通锟街憋拷锟�(d锟斤拷o)锟斤拷锟侥磁感撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷住通電岋拷(d锟斤拷o)锟斤拷锟斤拷讓锟斤拷直锟侥达拷拇指锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷指锟侥凤拷锟斤拷锟斤拷谴鸥芯锟斤拷沫h(hu锟斤拷n)锟紷锟斤拷锟斤拷; 2锟斤拷锟絟(hu锟斤拷n)锟斤拷锟斤拷锟斤拷拇鸥芯锟斤拷锟阶岋拷锟斤拷謴锟斤拷锟斤拷锟斤拷锟街革拷铜h(hu锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟�锟斤拷锟斤拷直锟侥达拷拇指锟斤拷指锟侥凤拷锟斤拷锟斤拷黔h(hu锟斤拷n)锟轿岋拷(d锟斤拷o)锟斤拷锟斤拷锟斤拷锟絊锟较磁感撅拷锟侥凤拷锟斤拷; 3锟斤拷通锟斤拷锟斤拷锟斤拷艿拇艌锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟阶★拷锟斤拷锟斤拷埽锟阶岋拷锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟�锟斤拷锟斤拷拇指锟斤拷指锟侥凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷軆锟�(n锟斤拷i)锟斤拷锟脚感撅拷锟侥凤拷锟斤拷;

锟斤拷锟斤拷锟斤拷锟斤拷锟截磁堬拷锟斤拷锟斤拷锟斤拷锟斤拷锟絘(ch锟斤拷n)锟斤拷锟侥磁堬拷;锟侥地磁憋拷锟絆(锟斤拷锟斤拷锟较極)锟斤拷锟截达拷锟较極(锟斤拷锟斤拷锟斤拷锟絆); 锟藉、锟脚感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟饺ｏ拷锟脚感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟斤拷锟斤拷锟斤拷锟斤拷锟脚堬拷锟斤拷(qi锟斤拷ng)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 1锟斤拷锟脚感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟饺的达拷锟�锟斤拷锟斤拷诖艌锟斤拷写锟街憋拷诖艌锟斤拷锟斤拷锟斤拷通電岋拷(d锟斤拷o)锟斤拷锟斤拷锟斤拷锟杰的帮拷锟斤拷锟斤拷F锟斤拷锟斤拷锟絀锟酵岋拷(d锟斤拷o)锟斤拷锟絃锟斤拷L锟侥乘積锟侥憋拷值锟斤拷锟叫磁感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟斤拷锟斤拷B=F/IL 2锟斤拷锟脚感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟饺的凤拷锟斤拷锟斤拷锟皆擄拷c锟脚堬拷锟侥凤拷锟斤拷(锟斤拷锟斤拷該锟絚锟斤拷小锟斤拷針憋拷锟絆锟斤拷指锟斤拷) 3锟斤拷锟脚感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟饺的囷拷锟紿锟斤拷位锟斤拷锟斤拷斯锟斤拷 T锟斤拷 1T=1N/A锟斤拷m

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟脚堬拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�; 1锟斤拷锟斤拷锟�锟斤拷锟斤拷趧锟�(qi锟斤拷ng)锟脚堬拷锟斤拷锟斤拷锟斤拷(d锟斤拷ng)通電岋拷(d锟斤拷o)锟斤拷锟絚锟脚堬拷锟斤拷直锟絩锟斤拷锟斤拷锟斤拷锟斤拷馨锟斤拷锟斤拷锟紽锟斤拷锟节磁感戯拷(y锟斤拷ng)锟斤拷(qi锟斤拷ng)锟斤拷B锟斤拷锟斤拷锟絀锟酵岋拷(d锟斤拷o)锟斤拷锟絃锟斤拷L锟斤拷锟竭的乘積锟斤拷2锟斤拷锟斤拷锟絰式F=BIL(锟絤锟斤拷锟节勶拷(qi锟斤拷ng)電堬拷锟斤拷锟斤拷(d锟斤拷o)锟斤拷锟杰短時) 3锟斤拷锟斤拷锟斤拷锟斤拷锟侥凤拷锟斤拷锟斤拷锟街讹拷锟絫锟斤拷锟斤拷锟絖锟斤拷锟斤拷锟斤拷使锟斤拷拇指锟斤拷锟斤拷锟斤拷锟侥傦拷锟斤拷指锟斤拷直锟斤拷锟斤拷锟揭革拷锟斤拷锟斤拷锟斤拷同一锟斤拷平锟斤拷锟�(n锟斤拷i)锟斤拷锟斤拷锟街凤拷锟斤拷艌锟斤拷校锟阶岋拷鸥芯锟斤拷锟街憋拷锟斤拷^锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟絖锟斤拷指指锟斤拷锟斤拷锟斤拷姆锟斤拷锟�锟斤拷锟斤拷么锟斤拷拇指锟斤拷指锟侥凤拷锟斤拷锟斤拷锟酵�電岋拷(d锟斤拷o)锟斤拷锟斤拷锟杰帮拷锟斤拷锟斤拷锟侥凤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紽锟斤拷锟斤拷锟斤拷锟斤拷僧a(ch锟斤拷n)锟斤拷锟脚堬拷;

锟斤拷锟斤拷锟剿★拷锟脚堬拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟絞锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷;(1)同锟斤拷锟斤拷锟斤拷a(ch锟斤拷n)锟斤拷锟斤拷锟斤拷; (2)锟斤拷锟斤拷锟斤拷锟斤拷a(ch锟斤拷n)锟斤拷锟斤拷锟斤拷;

锟斤拷锟斤拷十锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷f锟斤拷锟斤拷锟叫磁堬拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷a(ch锟斤拷n)锟斤拷锟斤拷;

锟斤拷锟斤拷十一锟斤拷锟斤拷锟皆诧拷锟斤拷:锟杰夠被忥拷(qi锟斤拷ng)锟揭磁伙拷锟斤拷锟斤拷锟絴(zh锟斤拷)锟叫达拷锟皆诧拷锟较ｏ拷(1)軟锟脚诧拷锟较ｏ拷锟脚伙拷锟斤拷锟斤拷锟斤拷去锟脚的诧拷锟斤拷;锟斤拷锟斤拷軟锟紽;锟斤拷锟�;锟斤拷(y锟斤拷ng)锟矫ｏ拷锟斤拷锟斤拷電达拷锟紽锟斤拷變锟斤拷锟斤拷锟斤拷(2)硬锟脚诧拷锟较ｏ拷锟脚伙拷锟斤拷锟斤拷锟斤拷去锟脚的诧拷锟斤拷;锟斤拷锟斤拷碳锟�锟斤拷锟絬锟�锟斤拷锟斤拷锟届：锟斤拷锟矫达拷锟紽;

锟斤拷锟斤拷十锟斤拷锟斤拷锟脚堬拷锟斤拷锟絓锟斤拷電荷碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟藉倫茲锟斤拷 1锟斤拷锟斤拷锟狡濓拷锟斤拷姆锟斤拷锟斤拷锟斤拷锟斤拷侄锟斤拷t锟叫斷：锟斤拷锟絖锟斤拷锟斤拷讓锟斤拷拇指锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟揭达拷直锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷艌锟斤拷锟�锟斤拷讓锟脚感撅拷锟斤拷直锟斤拷锟絕锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷電猴拷锟絓锟接凤拷锟斤拷(锟絚負(f锟斤拷)電猴拷锟絓锟接凤拷锟斤拷锟洁反)锟斤拷拇指锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷茲锟斤拷锟斤拷

锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

       锟竭讹拷锟斤拷锟斤拷锟�(f锟斤拷)锟斤拷(x锟斤拷)锟斤拷锟斤拷锟絉锟斤拷

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷(zh锟斤拷n)锟斤拷锟斤拷志愿锟斤拷锟�锟斤拷锟饺★拷锟�?j锟斤拷n)?sh锟斤拷)锟斤拷锟斤拷

锟竭匡拷锟絩锟絞锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷(ji锟斤拷)锟絚

锟組锟斤拷"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號