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

锟斤拷锟斤拷2.锟絎姆锟斤拷锟缴ｏ拷I锟斤拷U/R锟斤拷I锟斤拷锟斤拷(d锟斤拷o)锟絯锟斤拷锟斤拷锟�(qi锟斤拷ng)锟饺ｏ拷A锟斤拷锟斤拷U锟斤拷锟斤拷(d锟斤拷o)锟絯锟缴讹拷電夛拷锟斤拷V锟斤拷锟斤拷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.锟斤拷锟斤拷锟斤拷路锟叫ｏ拷锟斤拷锟斤拷I锟斤拷U/R,W锟斤拷Q锟斤拷锟斤拷锟絎锟斤拷Q锟斤拷UIt锟斤拷I2Rt锟斤拷U2t/R锟斤拷

锟斤拷锟斤拷4.锟斤拷锟�锟斤拷锟斤拷瓒�锟缴ｏ拷R锟斤拷ρL/S锟斤拷ρ:锟斤拷锟斤拷剩锟�Ω?m锟斤拷锟斤拷L:锟斤拷(d锟斤拷o)锟絯锟斤拷锟絃(zh锟斤拷ng)锟饺ｏ拷m锟斤拷锟斤拷S锟斤拷锟斤拷(d锟斤拷o)锟絯锟組锟斤拷锟斤拷e锟斤拷m2锟斤拷锟斤拷

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

锟斤拷锟斤拷6.锟絔锟斤拷锟铰凤拷W姆锟斤拷锟缴ｏ拷I锟斤拷E/锟斤拷r+R锟斤拷锟斤拷E锟斤拷Ir+IR也锟斤拷锟斤拷锟斤拷E锟斤拷U锟斤拷(n锟斤拷i)+U锟斤拷锟絀:锟铰凤拷械目锟斤拷锟斤拷锟斤拷A锟斤拷锟斤拷E锟斤拷锟皆措妱锟�(d锟斤拷ng)锟斤拷(sh锟斤拷)锟斤拷V锟斤拷锟斤拷R:锟斤拷锟铰凤拷锟借（Ω锟斤拷锟斤拷r锟斤拷锟皆达拷锟�(n锟斤拷i)锟借（Ω锟斤拷锟斤拷

锟斤拷锟斤拷7.锟斤拷锟斤拷锟斤拷锟缴ｏ拷Q锟斤拷I2Rt锟斤拷Q锟斤拷電熱（J锟斤拷锟斤拷I:通锟絕(gu锟斤拷)锟斤拷(d锟斤拷o)锟絯锟斤拷锟斤拷锟斤拷锟紸锟斤拷锟斤拷R锟斤拷锟斤拷(d锟斤拷o)锟絯锟斤拷锟斤拷锟街碉拷锟�Ω锟斤拷锟斤拷t锟斤拷通電時(sh锟斤拷)锟絞锟斤拷s锟斤拷锟斤拷

锟斤拷锟斤拷8.锟皆达拷锟斤拷锟�(d锟斤拷ng)锟绞★拷锟皆摧旓拷锟斤拷锟斤拷锟�锟斤拷锟皆葱э拷剩锟絇锟斤拷锟斤拷IE锟斤拷P锟斤拷锟斤拷IU锟斤拷η锟斤拷P锟斤拷/P锟斤拷锟斤拷I:锟铰凤拷锟斤拷锟斤拷锟斤拷A锟斤拷锟斤拷E:锟皆措妱锟�(d锟斤拷ng)锟斤拷锟斤拷V锟斤拷锟斤拷U:路锟斤拷電夛拷锟斤拷V锟斤拷锟斤拷η锟斤拷锟皆葱э拷锟絵锟斤拷

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)锟铰凤拷锟絇锟斤拷U锟絚R锟斤拷锟斤拷锟饺ｏ拷锟斤拷聯(li锟斤拷n)锟铰凤拷锟絇锟斤拷I锟絚R锟缴凤拷锟饺ｏ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R锟斤拷锟斤拷R1+R2+R3+1/R锟斤拷锟斤拷1/R1+1/R2+1/R3+锟斤拷锟斤拷P(gu锟斤拷n)系I锟斤拷锟斤拷I1锟斤拷I2锟斤拷I3I锟斤拷锟斤拷I1+I2+I3+電夛拷锟絇(gu锟斤拷n)系U锟斤拷锟斤拷U1+U2+U3+U锟斤拷锟斤拷U1锟斤拷U2锟斤拷U3锟斤拷锟绞凤拷锟斤拷P锟斤拷锟斤拷P1+P2+P3+P锟斤拷锟斤拷P1+P2+P3+

锟斤拷锟斤拷10.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

锟斤拷锟斤拷锟斤拷锟斤拷锟接凤拷锟斤拷電夛拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)锟斤拷锟斤拷小锟斤拷锟铰凤拷锟�(ji锟斤拷n)锟轿ｏ拷锟斤拷锟斤拷小锟斤拷電夛拷锟絳(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斤拷锟絕锟斤拷锟斤拷锟斤拷{(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

锟斤拷锟斤拷11.锟斤拷锟斤拷锟斤拷锟統(c锟斤拷)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锟斤拷UR+UA锟斤拷锟斤拷锟绞撅拷锟�(sh锟斤拷)锟斤拷I锟斤拷IR+IVRx锟侥測(c锟斤拷)锟斤拷值锟斤拷U/I锟斤拷(UA+UR)/IR锟斤拷RA+Rx>R锟斤拷Rx锟侥測(c锟斤拷)锟斤拷值锟斤拷U/I锟斤拷UR/(IR+IV)锟斤拷RVRx/(RV+R)<R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]锟絰锟斤拷锟铰凤拷l锟斤拷Rx<<RV[锟斤拷Rx<(RARV)1/2]锟斤拷

锟斤拷锟斤拷12.锟絎姆锟斤拷y(c锟斤拷)锟斤拷锟�

锟斤拷锟斤拷(1)锟铰凤拷M锟斤拷

锟斤拷锟斤拷(2)锟統(c锟斤拷)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斤拷锟絳(di锟斤拷o)锟斤拷(ji锟斤拷)Ro使電憋拷指針滿(m锟斤拷n)偏锟斤拷锟斤拷Ig锟斤拷E/(r+Rg+Ro)锟斤拷锟诫被锟統(c锟斤拷)锟斤拷锟絉x锟斤拷通锟絕(gu锟斤拷)電憋拷锟斤拷锟斤拷锟斤拷锟絀x锟斤拷E/(r+Rg+Ro+Rx)锟斤拷E/(R锟斤拷+Rx)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(c锟斤拷)锟斤拷锟斤拷小锟斤拷

锟斤拷锟斤拷(3)使锟矫凤拷锟斤拷锟斤拷锟紺(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★拷锟教接歐姆锟絳(di锟斤拷o)锟斤拷锟斤拷锟統(c锟斤拷)锟斤拷锟絰锟斤拷(sh锟斤拷)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)注锟解：锟統(c锟斤拷)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_(k锟斤拷i)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矫匡拷螕Q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

锟斤拷锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷锟絓(y锟斤拷n)锟斤拷(d锟斤拷ng)锟斤拷锟斤拷锟斤拷

锟斤拷锟铰高匡拷锟結訊锟斤拷锟竭匡拷锟斤拷锟竭★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(xi锟斤拷n)锟斤拷

锟竭匡拷锟絩(sh锟斤拷)锟絞锟斤拷(xi锟斤拷n)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"锟竭匡拷锟絎(w锟斤拷ng)"微锟脚癸拷锟斤拷號(h锟斤拷o)