2011锟斤拷呖锟斤拷锟斤拷锟斤拷锟捷嗭拷锟�(f锟斤拷)锟斤拷(x锟斤拷)锟絲锟統之電磁感戯拷(y锟斤拷ng)

锟斤拷锟斤拷一锟斤拷锟絰锟斤拷锟絵(锟斤拷锟絵锟斤拷10小锟絵,锟斤拷40锟斤拷.锟斤拷每小锟絵锟給锟斤拷锟斤拷锟侥傦拷(g锟斤拷)锟絰锟�(xi锟斤拷ng)锟斤拷,锟叫碉拷只锟斤拷一锟斤拷(g锟斤拷)锟絰锟�(xi锟斤拷ng)锟斤拷锟絖,锟叫碉拷锟叫讹拷锟斤拷(g锟斤拷)锟絰锟�(xi锟斤拷ng)锟斤拷锟絖.全锟斤拷锟絰锟斤拷锟侥碉拷4锟斤拷,锟絰锟斤拷锟斤拷锟斤拷全锟侥碉拷2锟斤拷,锟斤拷锟絰锟絜(cu锟斤拷)锟侥碉拷0锟斤拷)
锟斤拷锟斤拷1.锟斤拷D12-1锟斤拷示锟斤拷锟斤拷锟劫桿ab锟斤拷cd锟斤拷锟斤拷锟节光滑锟斤拷(d锟斤拷o)軌PQ锟斤拷RS锟较伙拷锟斤拷(d锟斤拷ng)锟斤拷锟斤拷(qi锟斤拷ng)锟脚堬拷锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷(d锟斤拷ng)ab锟斤拷cd锟街別锟斤拷锟劫讹拷v1锟斤拷v2锟斤拷锟斤拷(d锟斤拷ng)锟絩(sh锟斤拷)锟斤拷锟絣(f锟斤拷)锟紽(xi锟斤拷n)锟斤拷路锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�?y锟斤拷n)锟斤拷锟絩(sh锟斤拷)針凤拷锟斤拷锟斤拷锟絫v1锟斤拷v2锟侥达拷小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
锟斤拷锟斤拷锟紻12-1
锟斤拷锟斤拷A.v1锟斤拷v2,v1锟斤拷锟斤拷锟斤拷v2锟斤拷锟斤拷
锟斤拷锟斤拷B.v1锟斤拷v2,v1锟斤拷v2锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷C.v1=v2,v1锟斤拷v2锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷D.v1=v2,v1锟斤拷v2锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷:锟斤拷锟铰穉bdc锟叫產(ch锟斤拷n)锟斤拷锟斤拷r(sh锟斤拷)針凤拷锟斤拷母锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絵锟斤拷锟街�锟斤拷路abdc锟斤拷锟斤拷e锟斤拷(y锟斤拷ng)锟斤拷锟斤拷锟絰锟�(xi锟斤拷ng)A锟斤拷C锟斤拷D锟絜(cu锟斤拷)锟絗锟斤拷B锟斤拷锟絖.
锟斤拷锟斤拷锟斤拷:B
锟斤拷锟斤拷2.(2010锟接憋拷锟斤拷山锟斤拷锟斤拷锟斤拷锟阶ｏ拷12)锟斤拷D12-2锟斤拷示锟斤拷锟斤拷一锟斤拷(g锟斤拷)锟絔锟较撅拷圈锟斤拷锟斤拷锟斤拷锟轿达拷锟紽锟缴磁極之锟絞(锟缴磁極锟絞锟脚堬拷锟斤拷視锟斤拷锟�(qi锟斤拷ng)锟脚堬拷)锟斤拷锟斤拷锟轿达拷锟紽锟斤拷锟絔锟较撅拷圈锟斤拷锟斤拷锟斤拷锟紷OO′锟絊锟紻(zhu锟斤拷n)锟斤拷(d锟斤拷ng).锟斤拷(d锟斤拷ng)锟斤拷锟轿达拷锟紽锟斤拷锟斤拷锟紻(zhu锟斤拷n)锟斤拷(d锟斤拷ng)锟絩(sh锟斤拷)锟斤拷锟斤拷圈也锟絖始锟紻(zhu锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷(d锟斤拷ng)锟斤拷圈锟斤拷锟紻(zhu锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷(w锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷(锟斤拷锟斤拷)
锟斤拷锟斤拷
锟斤拷锟斤拷锟紻12-2
锟斤拷锟斤拷A.锟斤拷圈锟絚锟斤拷锟轿达拷锟紽锟斤拷锟紻(zhu锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷锟斤拷同
锟斤拷锟斤拷B.锟斤拷圈锟絚锟斤拷锟轿达拷锟紽锟斤拷锟紻(zhu锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷锟洁反
锟斤拷锟斤拷C.锟斤拷圈锟叫產(ch锟斤拷n)锟斤拷锟斤拷锟斤拷锟�
锟斤拷锟斤拷D.锟斤拷圈锟叫產(ch锟斤拷n)锟斤拷锟斤拷锟叫★拷锟阶冿拷锟斤拷锟斤拷锟阶冿拷锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷:锟斤拷锟絵锟斤拷锟介法锟斤拷锟斤拷電磁感戯拷(y锟斤拷ng)锟斤拷锟斤拷锟斤拷锟斤拷味锟斤拷傻瓤锟斤拷c(di锟斤拷n).锟斤拷锟斤拷(j锟斤拷)锟斤拷味锟斤拷傻锟斤拷茝V锟斤拷锟絰锟斤拷知A锟斤拷锟絖锟斤拷B锟絜(cu锟斤拷)锟絗锟斤拷锟斤拷K锟絖(d锟斤拷)锟斤拷锟斤拷(w锟斤拷n)锟斤拷锟斤拷B(t锟斤拷i)锟絩(sh锟斤拷)锟斤拷锟紽锟饺撅拷圈锟斤拷锟紻(zhu锟斤拷n)锟劫达拷锟斤拷锟絫锟斤拷锟紽锟斤拷锟斤拷锟斤拷圈锟斤拷锟斤拷锟絊锟斤拷锟斤拷锟劫圓锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷锟皆產(ch锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷榻伙拷锟斤拷.
锟斤拷锟斤拷锟斤拷:AC
锟斤拷锟斤拷3.锟斤拷D12-3 锟斤拷示,锟斤拷圈M锟酵撅拷圈P锟紷锟斤拷同一锟紽芯锟斤拷.锟絆(sh锟斤拷)锟缴傦拷(g锟斤拷)锟斤拷圈锟叫碉拷锟斤拷锟斤拷锟斤拷锟斤拷c锟紻锟斤拷锟斤拷锟斤拷(bi锟斤拷o)锟斤拷锟� 锟斤拷锟斤拷锟斤拷锟斤拷同锟絩(sh锟斤拷)锟斤拷锟斤拷.锟斤拷(d锟斤拷ng)M锟斤拷通锟斤拷锟斤拷锟斤拷锟侥種锟斤拷锟斤拷r(sh锟斤拷),锟节撅拷圈P锟斤拷锟杰產(ch锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷暮愣�锟叫戯拷(y锟斤拷ng)锟斤拷锟�(锟斤拷锟斤拷)
锟斤拷锟斤拷
锟斤拷锟斤拷锟紻12-3
锟斤拷锟斤拷
锟斤拷锟斤拷锟紻12-4
锟斤拷锟斤拷锟斤拷锟斤拷:锟斤拷(j锟斤拷)锟斤拷味锟斤拷桑锟絇锟叫產(ch锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷暮愣�锟叫戯拷(y锟斤拷ng)锟斤拷锟斤拷f锟斤拷M锟斤拷通锟斤拷锟斤拷锟斤拷锟角撅拷锟斤拷變锟斤拷锟斤拷锟斤拷锟揭凤拷锟斤拷?y锟斤拷n)锟斤拷锟斤拷锟斤拷锟絩(sh锟斤拷)锟斤拷(y锟斤拷ng)锟斤拷锟斤拷p锟斤拷锟斤拷锟斤拷D锟斤拷锟絖.
锟斤拷锟斤拷锟斤拷:D
锟斤拷锟斤拷4.锟斤拷 锟紻12-5锟斤拷示锟斤拷邊锟絃锟斤拷L锟斤拷锟斤拷锟斤拷锟轿岋拷(d锟斤拷o)锟斤拷锟斤拷锟絴(zh锟斤拷)锟斤拷锟斤拷m锟斤拷锟缴撅拷艌锟紿锟斤拷處锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷邊ab锟組(j锟斤拷n)锟斤拷锟�(qi锟斤拷ng)锟脚堬拷锟斤拷锟斤拷锟斤拷圈锟絖始锟斤拷锟絧锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷直锟斤拷锟斤拷锟斤拷邊cd锟斤拷锟斤拷锟斤拷锟斤拷锟脚堬拷锟絩(sh锟斤拷)锟斤拷锟劫度減锟斤拷ab邊锟組(j锟斤拷n)锟斤拷艌锟斤拷r(sh锟斤拷)锟斤拷一锟斤拷锟斤拷锟脚堬拷锟侥岋拷锟斤拷也锟斤拷L锟斤拷锟絫锟斤拷锟斤拷越锟斤拷(qi锟斤拷ng)锟脚堬拷锟絕锟斤拷锟叫產(ch锟斤拷n)锟斤拷锟侥斤拷锟斤拷锟斤拷锟�(锟斤拷锟斤拷)
锟斤拷锟斤拷
锟斤拷锟斤拷锟紻12-5
锟斤拷锟斤拷A.2mgL        B.2mgL+mgH        C.         D.
锟斤拷锟斤拷锟斤拷锟斤拷:锟絆(sh锟斤拷)锟斤拷锟組(j锟斤拷n)锟斤拷艌锟斤拷r(sh锟斤拷)锟斤拷锟劫度烇拷v1,锟斤拷锟斤拷锟斤拷锟脚堬拷锟絩(sh锟斤拷)锟斤拷锟劫讹拷 锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絖始锟組(j锟斤拷n)锟斤拷艌锟斤拷锟斤拷锟饺�锟斤拷锟斤拷锟脚堬拷锟斤拷锟斤拷锟斤拷叨葹锟�2L.锟斤拷锟絵锟斤拷锟� 锟斤拷
锟斤拷锟斤拷 锟斤拷
锟斤拷锟斤拷锟缴①②③碉拷 .C锟絰锟�(xi锟斤拷ng)锟斤拷锟絖.
锟斤拷锟斤拷锟斤拷:C
锟斤拷锟斤拷5.锟斤拷D12-6(a)锟斤拷示,锟紸锟轿撅拷圈P锟給止锟斤拷水平锟斤拷锟斤拷锟斤拷,锟斤拷锟斤拷锟较凤拷锟揭掞拷一锟斤拷同锟斤拷圈Q,P锟斤拷Q锟斤拷锟絊,Q锟斤拷通锟斤拷變锟斤拷锟斤拷锟�,锟斤拷锟斤拷S锟絩(sh锟斤拷)锟絞變锟斤拷锟斤拷規(gu锟斤拷)锟斤拷锟斤拷D12-6(b)锟斤拷示,P锟斤拷锟杰碉拷锟斤拷锟斤拷锟斤拷G,锟斤拷锟芥對P锟斤拷支锟斤拷锟斤拷锟斤拷FN,锟絫(锟斤拷锟斤拷)
锟斤拷锟斤拷
锟斤拷锟斤拷锟紻12-6
锟斤拷锟斤拷A.t1锟絩(sh锟斤拷)锟斤拷FN锟斤拷G        B.t2锟絩(sh锟斤拷)锟斤拷FN锟斤拷G        C.t3锟絩(sh锟斤拷)锟斤拷FN锟斤拷G        D.t4锟絩(sh锟斤拷)锟斤拷FN=G
锟斤拷锟斤拷锟斤拷锟斤拷:t1锟絩(sh锟斤拷)锟斤拷,Q锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�,锟斤拷锟絕P锟侥达拷通锟斤拷锟斤拷锟斤拷,P锟叫產(ch锟斤拷n)锟斤拷锟絚Q锟斤拷锟斤拷锟洁反锟侥感戯拷(y锟斤拷ng)锟斤拷锟�,锟斤拷锟斤拷锟斤拷锟斤拷嗷ワ拷懦锟�,锟斤拷锟斤拷FN锟斤拷G;t2锟絩(sh锟斤拷)锟斤拷Q锟斤拷锟斤拷锟斤拷锟�(w锟斤拷n)锟斤拷,P锟叫达拷通锟斤拷锟斤拷變,锟絔锟叫感戯拷(y锟斤拷ng)锟斤拷锟�,FN=G;t3锟絩(sh锟斤拷)锟斤拷Q锟斤拷锟斤拷锟斤拷锟斤拷锟�,P锟叫產(ch锟斤拷n)锟斤拷锟絚Q锟斤拷t3锟絩(sh锟斤拷)锟斤拷前锟斤拷锟斤拷锟斤拷同锟侥感戯拷(y锟斤拷ng)锟斤拷锟�,锟斤拷Q锟叫沒锟斤拷锟斤拷锟�,锟斤拷锟皆無锟洁互锟斤拷锟斤拷,FN=G;t4锟絩(sh锟斤拷)锟斤拷,P锟叫沒锟叫感戯拷(y锟斤拷ng)锟斤拷锟�,FN=G.
锟斤拷锟斤拷锟斤拷:AD
 

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2011锟斤拷呖锟斤拷锟斤拷锟斤拷锟捷嗭拷锟�(f锟斤拷)锟斤拷(x锟斤拷)锟絲锟統之電磁感戯拷(y锟斤拷ng)

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