锟斤拷锟斤拷锟斤拷锟斤拷電學(xu锟斤拷)锟斤拷式锟絯锟絳锟斤拷锟結(ji锟斤拷)

锟斤拷源锟斤拷锟斤拷锟斤拷锟絎(w锟斤拷ng) 2021-12-02 20:05:56

[锟斤拷(bi锟斤拷o)锟斤拷锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟斤拷知锟絉(sh锟斤拷)锟絚(di锟斤拷n)]

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角革拷锟叫憋拷锟絕锟斤拷要锟斤拷一锟斤拷(g锟斤拷)锟絎(xu锟斤拷)锟狡ｏ拷電學(xu锟斤拷)锟斤拷锟角革拷锟斤拷锟斤拷锟斤拷锟叫碉拷一锟斤拷(g锟斤拷)锟斤拷要锟斤拷知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟斤拷锟斤拷要锟絎(xu锟斤拷)锟斤拷锟斤拷锟斤拷電學(xu锟斤拷)锟斤拷锟街就憋拷锟揭拷锟斤拷蘸锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟絯锟絳锟斤拷一些锟斤拷锟斤拷電學(xu锟斤拷)锟斤拷式锟斤拷锟斤拷锟斤拷覅锟斤拷锟�锟斤拷

锟斤拷锟斤拷1一锟斤拷電堬拷

锟斤拷锟斤拷1.锟缴種電猴拷锟斤拷電猴拷锟截恒定锟斤拷锟斤拷元電荷ｏ拷(e=1.60×10-19C)

锟斤拷锟斤拷2.锟斤拷锟斤拷锟斤拷桑锟紽锟斤拷kQ1Q2/r2锟斤拷锟斤拷锟斤拷锟斤拷校锟�

锟斤拷锟斤拷3.電堬拷锟斤拷(qi锟斤拷ng)锟饺ｏ拷E锟斤拷F/q锟斤拷锟斤拷锟絰式锟斤拷計(j锟斤拷)锟斤拷式)

锟斤拷锟斤拷4.锟斤拷锟斤拷c(di锟斤拷n)锟斤拷源锟斤拷電猴拷锟轿成碉拷電堬拷E锟斤拷kQ/r2

锟斤拷锟斤拷5.锟斤拷(qi锟斤拷ng)電堬拷锟侥堬拷锟斤拷(qi锟斤拷ng)E锟斤拷UAB/d

锟斤拷锟斤拷6.電堬拷锟斤拷锟斤拷F锟斤拷qE

锟斤拷锟斤拷7.電勶拷(sh锟斤拷)锟絚電勶拷(sh锟斤拷)锟筋：UAB锟斤拷φA-φB锟斤拷UAB锟斤拷WAB/q锟斤拷-ΔEAB/q

锟斤拷锟斤拷8.電堬拷锟斤拷锟斤拷锟斤拷锟斤拷WAB锟斤拷qUAB锟斤拷Eqd

锟斤拷锟斤拷9.電勶拷(sh锟斤拷)锟杰ｏ拷EA锟斤拷qφA

锟斤拷锟斤拷10.電勶拷(sh锟斤拷)锟杰碉拷變锟斤拷ΔEAB锟斤拷EB-EA

锟斤拷锟斤拷11.電堬拷锟斤拷锟斤拷锟斤拷锟絚電勶拷(sh锟斤拷)锟斤拷變锟斤拷ΔEAB锟斤拷-WAB锟斤拷-qUAB(電勶拷(sh锟斤拷)锟杰碉拷锟斤拷锟斤拷锟斤拷锟斤拷電堬拷锟斤拷锟斤拷锟斤拷锟斤拷負(f锟斤拷)值)

锟斤拷锟斤拷12.锟斤拷锟紺锟斤拷Q/U(锟斤拷锟絰式,計(j锟斤拷)锟斤拷式)

锟斤拷锟斤拷13.平锟叫帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷C锟斤拷εS/4πkd

锟斤拷锟斤拷14.锟斤拷锟斤拷锟斤拷锟斤拷锟诫妶锟斤拷械募锟斤拷锟�(Vo锟斤拷0)锟斤拷W锟斤拷ΔEK锟斤拷qU锟斤拷mVt2/2锟斤拷Vt锟斤拷(2qU/m)1/2

锟斤拷锟斤拷15.锟斤拷锟斤拷锟斤拷锟斤拷卮锟街彪妶锟斤拷锟斤拷锟斤拷锟斤拷俣锟絍o锟組(j锟斤拷n)锟斤拷锟�(qi锟斤拷ng)電堬拷锟絩(sh锟斤拷)锟斤拷偏锟紻(zhu锟斤拷n)(锟斤拷锟斤拷锟絔锟斤拷锟斤拷锟斤拷锟矫碉拷锟斤拷r锟斤拷)锟狡斤拷锟街彪妶锟斤拷锟斤拷锟�:锟斤拷锟斤拷直锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)L锟斤拷Vot(锟节庯拷锟斤拷锟斤拷锟斤拷锟絅電荷碉拷平锟叫極锟斤拷锟叫ｏ拷E锟斤拷U/d)锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)平锟斤拷電堬拷锟斤拷锟斤拷:锟斤拷锟劫度烇拷锟斤拷膭锟斤拷锟斤拷直锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)d锟斤拷at2/2锟斤拷a锟斤拷F/m锟斤拷qE/m

锟斤拷锟斤拷2锟斤拷锟斤拷锟姐定锟斤拷锟�

锟斤拷锟斤拷1.锟斤拷锟斤拷锟�(qi锟斤拷ng)锟饺ｏ拷I=q/t{I:锟斤拷锟斤拷锟�(qi锟斤拷ng)锟斤拷(A)锟斤拷q:锟节時(sh锟斤拷)锟絞t锟斤拷(n锟斤拷i)通锟絕锟斤拷(d锟斤拷o)锟絯锟組锟絛锟斤拷锟斤拷锟斤拷(C)锟斤拷t:锟絩(sh锟斤拷)锟絞(s)锟斤拷

锟斤拷锟斤拷2.锟絎姆锟斤拷锟缴ｏ拷I=U/R{I:锟斤拷(d锟斤拷o)锟絯锟斤拷锟斤拷锟�(qi锟斤拷ng)锟斤拷(A)锟斤拷U:锟斤拷(d锟斤拷o)锟絯锟缴讹拷電夛拷(V)锟斤拷R:锟斤拷(d锟斤拷o)锟絯锟斤拷值(Ω)锟斤拷

锟斤拷锟斤拷3.锟斤拷锟�锟斤拷锟斤拷瓒拷桑锟絉=ρL/S{ρ:锟斤拷锟斤拷锟�(Ω?m)锟斤拷L:锟斤拷(d锟斤拷o)锟絯锟斤拷锟絃锟斤拷(m)锟斤拷S:锟斤拷(d锟斤拷o)锟絯锟組锟斤拷锟斤拷e(m2)锟斤拷

锟斤拷锟斤拷4.锟絔锟斤拷锟铰凤拷W姆锟斤拷锟缴ｏ拷I=E/(r+R)锟斤拷E=Ir+IR也锟斤拷锟斤拷锟斤拷E=U锟斤拷(n锟斤拷i)+U锟斤拷

锟斤拷锟斤拷{I:锟铰凤拷械目锟斤拷锟斤拷(A)锟斤拷E:锟皆措妱锟�(d锟斤拷ng)锟斤拷(sh锟斤拷)(V)锟斤拷R:锟斤拷锟铰凤拷锟斤拷(Ω)锟斤拷r:锟皆达拷锟�(n锟斤拷i)锟斤拷(Ω)锟斤拷

锟斤拷锟斤拷5.電癸拷锟絚電癸拷锟绞ｏ拷W=UIt锟斤拷P=UI{W:電癸拷(J)锟斤拷U:電夛拷(V)锟斤拷I:锟斤拷锟�(A)锟斤拷t:锟絩(sh锟斤拷)锟絞(s)锟斤拷P:電癸拷锟斤拷(W)锟斤拷

锟斤拷锟斤拷6.锟斤拷锟斤拷锟斤拷锟缴ｏ拷Q=I2Rt{Q:電燂拷(J)锟斤拷I:通锟絕锟斤拷(d锟斤拷o)锟絯锟斤拷锟斤拷锟�(A)锟斤拷R:锟斤拷(d锟斤拷o)锟絯锟斤拷锟斤拷锟街�(Ω)锟斤拷t:通電時(sh锟斤拷)锟絞(s)锟斤拷

锟斤拷锟斤拷7.锟斤拷锟斤拷锟斤拷路锟斤拷:锟斤拷锟斤拷I=U/R,W=Q锟斤拷锟斤拷锟絎=Q=UIt=I2Rt=U2t/R

锟斤拷锟斤拷8.锟皆达拷锟斤拷锟�(d锟斤拷ng)锟斤拷锟斤拷锟皆摧旓拷锟斤拷锟斤拷省锟斤拷源效锟绞ｏ拷P锟斤拷=IE锟斤拷P锟斤拷=IU锟斤拷η=P锟斤拷/P锟斤拷{I:锟铰凤拷锟斤拷锟斤拷(A)锟斤拷E:锟皆措妱锟�(d锟斤拷ng)锟斤拷(sh锟斤拷)(V)锟斤拷U:路锟斤拷電夛拷(V)锟斤拷η锟斤拷锟皆葱э拷剩锟�

锟斤拷锟斤拷9.锟铰凤拷拇锟�/锟斤拷聯(li锟斤拷n)锟斤拷聯(li锟斤拷n)锟铰�(P锟斤拷U锟絚R锟斤拷锟斤拷锟斤拷)锟斤拷聯(li锟斤拷n)锟铰�(P锟斤拷I锟絚R锟缴凤拷锟斤拷)

锟斤拷锟斤拷锟斤拷锟斤拷P(gu锟斤拷n)系(锟斤拷同锟斤拷锟斤拷)

锟斤拷锟斤拷R锟斤拷=R1+R2+R3+

锟斤拷锟斤拷1/R锟斤拷=1/R1+1/R2+1/R3+

锟斤拷锟斤拷锟斤拷锟斤拷P(gu锟斤拷n)系I锟斤拷=I1=I2=I3I锟斤拷=I1+I2+I3+

锟斤拷锟斤拷電夛拷锟絇(gu锟斤拷n)系U锟斤拷=U1+U2+U3+U锟斤拷=U1=U2=U3

锟斤拷锟斤拷锟斤拷锟绞凤拷锟斤拷P锟斤拷=P1+P2+P3+P锟斤拷=P1+P2+P3+

锟斤拷锟斤拷10.锟絎姆锟斤拷y锟斤拷锟�

锟斤拷锟斤拷(1)锟铰凤拷M锟斤拷(2)锟統锟斤拷原锟斤拷

锟斤拷锟斤拷锟缴憋拷锟絇锟教接猴拷,锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)Ro使電憋拷指針滿偏锟斤拷锟斤拷Ig=E/(r+Rg+Ro)锟斤拷锟诫被锟統锟斤拷锟絉x锟斤拷通锟絕電憋拷锟斤拷锟斤拷锟斤拷锟絀x=E/(r+Rg+Ro+Rx)=E/(R锟斤拷+Rx)

锟斤拷锟斤拷锟斤拷锟斤拷Ix锟絚Rx锟斤拷(du锟斤拷)锟斤拷(y锟斤拷ng)锟斤拷锟斤拷丝锟街甘撅拷锟斤拷y锟斤拷锟斤拷小

锟斤拷锟斤拷(3)使锟矫凤拷锟斤拷:锟紺(j锟斤拷)械锟絳(di锟斤拷o)锟斤拷锟斤拷锟絰锟斤拷锟斤拷锟教★拷锟絎姆锟絳(di锟斤拷o)锟斤拷锟斤拷锟統锟斤拷锟絰锟斤拷(sh锟斤拷){注锟斤拷锟轿�(锟斤拷锟斤拷)锟斤拷锟斤拷锟斤拷off锟斤拷锟斤拷

锟斤拷锟斤拷(4)注锟斤拷:锟統锟斤拷锟斤拷锟絩(sh锟斤拷)锟斤拷要锟絚原锟铰凤拷锟斤拷_,锟絰锟斤拷锟斤拷锟斤拷使指锟斤拷锟斤拷锟斤拷敫斤拷锟�,每锟轿換锟斤拷要锟斤拷锟铰短接歐姆锟絳(di锟斤拷o)锟斤拷锟斤拷

锟斤拷锟斤拷11.锟斤拷锟斤拷锟斤拷锟統锟斤拷锟�

锟斤拷锟斤拷電夛拷锟斤拷示锟斤拷(sh锟斤拷)锟斤拷U=UR+UA

锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟�(sh锟斤拷)锟斤拷I=IR+IV

锟斤拷锟斤拷Rx锟侥測锟斤拷值=U/I=(UA+UR)/IR=RA+Rx>R锟斤拷

锟斤拷锟斤拷Rx锟侥測锟斤拷值=U/I=UR/(IR+IV)=RVRx/(RV+R)

锟斤拷锟斤拷锟絰锟斤拷锟铰凤拷l锟斤拷Rx>>RA[锟斤拷Rx>(RARV)1/2]

锟斤拷锟斤拷锟絰锟斤拷锟铰凤拷l锟斤拷Rx
锟斤拷锟斤拷12.锟斤拷锟斤拷(d锟斤拷ng)變锟斤拷锟斤拷锟斤拷锟铰凤拷械锟斤拷锟斤拷锟斤拷臃锟斤拷c锟街夛拷锟接凤拷

锟斤拷锟斤拷電夛拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)锟斤拷锟斤拷小,锟铰凤拷锟斤拷锟�,锟斤拷锟斤拷小

锟斤拷锟斤拷锟斤拷锟斤拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)電夛拷锟斤拷锟絰锟斤拷l锟斤拷Rp>Rx

锟斤拷锟斤拷電夛拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)锟斤拷锟斤拷锟斤拷,锟铰凤拷锟�(f锟斤拷)锟絪,锟斤拷锟斤拷锟絕锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)電夛拷锟斤拷锟絰锟斤拷l锟斤拷Rp

锟斤拷锟斤拷(1)锟斤拷位锟絈锟姐：1A=103mA=106μA;1kV=103V=106mA;1MΩ=103kΩ=106Ω

锟斤拷锟斤拷(2)锟斤拷锟絅锟斤拷锟较碉拷锟斤拷锟斤拷识锟斤拷S锟截度碉拷變锟斤拷锟斤拷變锟斤拷,锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷S锟截讹拷锟斤拷锟竭讹拷锟斤拷锟斤拷;

锟斤拷锟斤拷(3)锟斤拷聯(li锟斤拷n)锟斤拷锟斤拷锟斤拷锟斤拷锟轿猴拷一锟斤拷(g锟斤拷)锟斤拷锟斤拷锟�,锟斤拷聯(li锟斤拷n)锟斤拷锟斤拷锟叫★拷锟斤拷魏锟揭伙拷锟�(g锟斤拷)锟斤拷锟斤拷锟�;

锟斤拷锟斤拷(4)锟斤拷(d锟斤拷ng)锟皆达拷袃锟�(n锟斤拷i)锟斤拷r(sh锟斤拷),锟斤拷锟铰凤拷锟斤拷锟斤拷锟斤拷r(sh锟斤拷),锟斤拷锟斤拷锟斤拷p小,路锟斤拷電夛拷锟斤拷锟斤拷;

锟斤拷锟斤拷(5)锟斤拷(d锟斤拷ng)锟斤拷锟铰凤拷锟斤拷锟斤拷锟斤拷源锟斤拷锟絩(sh锟斤拷),锟皆摧旓拷锟斤拷锟斤拷锟斤拷锟斤拷,锟剿時(sh锟斤拷)锟斤拷輸锟斤拷锟斤拷锟绞烇拷E2/(2r);

锟斤拷锟斤拷(6)锟斤拷锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷(n锟斤拷i)锟捷ｏ拷锟斤拷锟斤拷锟斤拷c锟截度碉拷锟絇(gu锟斤拷n)系锟诫導(d锟斤拷o)锟絯锟斤拷锟戒應(y锟斤拷ng)锟矫筹拷锟斤拷(d锟斤拷o)锟斤拷锟戒應(y锟斤拷ng)锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟絇(gu锟斤拷n)锟斤拷锟絔锟斤拷

锟斤拷锟斤拷锟竭匡拷锟斤拷锟斤拷知锟絉(sh锟斤拷)锟絚(di锟斤拷n)锟絉锟斤拷

锟斤拷锟斤拷計(j锟斤拷)锟斤拷锟斤拷锟斤拷锟侥癸拷式锟斤拷?

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)锟戒、志愿锟斤拷锟�(b锟斤拷o)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(sh锟斤拷)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(di锟斤拷n)

锟組锟斤拷"微锟斤拷"