四个阻值为r的电阻串联,其等效电阻值为多少r 四个阻值为r的电阻全部使用
\u56db\u4e2a\u963b\u503c\u4e3aR\u7684\u7535\u963b\uff0c\u53ef\u7ecf\u8fc7\u9002\u5f53\u7684\u8fde\u63a5\uff0c\u4f7f\u5176\u7b49\u6548\u7535\u963b\u503c\u4ecd\u4e3aR?\u6bd4\u59824\u4e2a\u7535\u963b\u90fd\u662f8\u6b27\u59c6\u3002\u5148\u6bcf\u4e24\u4e2a\u5e76\u8054\u5728\u4e00\u8d77\uff0c\u5219\u5e76\u8054\u540e\u7684\u963b\u503c\u4e3a4\u6b27\u59c6; \u7136\u540e\u518d\u4e32\u8054\u5728\u4e00\u8d77\uff0c\u4e24\u4e2a4\u6b27\u59c6\u7684\u7535\u963b\u4e32\u8054\u7684\u963b\u503c\u4e3a8\u6b27\u59c6\u3002
A
4\u4e2a\u4e32\u662f4R 2\u4e2a2\u4e2a\u5148\u4e32\u518d\u5e76\u662fR 2\u4e2a2\u4e2a\u5148\u5e76\u518d\u4e32\u4e5f\u662fR 2\u4e2a\u4e32\u662f2R
C\u4e5f\u53ef\u5f97\u5230,D\u6ca1\u6cd5\u5f97\u5230
r+r+r+r=4r
并联:
1/(1/r+1/r+1/r+1/r)=r/4
就是4倍r啊
绛旓細鏍规嵁宸﹀浘鐢佃矾娴佸悜锛屽叾绛夋晥鐢佃矾鍥惧鍙冲浘锛岋紝R1R2骞惰仈鐢甸樆R12绛変簬R/2锛孯4R5骞惰仈鐢甸樆R45绛変簬R/2锛孯12涓嶳45涓茶仈鐢甸樆涓篟涓=R12+R34=R/2+R/2=R锛R涓蹭笌R3骞惰仈锛屽垯AB闂寸數闃讳负R鎬=R/2
绛旓細80娆у 鍥犱负涓茶仈鐢甸樆鐨勭瓑鏁堢數闃绛変簬鍚勭數闃讳箣鍜岋細r鎬=r1+r2+r3+鈥︹+rn 涓茶仈鐢佃矾鍏朵粬鎬ц川 1锛庝覆鑱旂數璺數娴佸澶勭浉绛夛細i鎬 = i1 = i2 = i3 =鈥︹= in 2锛庝覆鑱旂數璺荤數鍘嬬瓑浜庡悇澶勭數鍘嬩箣鍜岋細u鎬=u1+u2+u3+鈥︹+un 3锛庝覆鑱旂數闃荤殑绛夋晥鐢甸樆绛変簬鍚勭數闃讳箣鍜岋細r鎬=r1+r2+r3+鈥︹+rn 4锛庝覆鑱...
绛旓細锛1锛夊綋S闂悎锛孲鈥叉柇寮鏃锛岀數闃籖 1 涓嶳 3 涓茶仈鐢甸樆R 13 =R 1 +R 3 =4惟锛岀數闃籖 2 涓嶳 4 涓茶仈鐢甸樆R 24 =R 2 +R 4 =6惟锛岀敱浜庡苟鑱旂數璺數鍘嬬浉绛夛紝鍒欓氳繃R 1 鍜孯 2 鐨勭數娴佷箣姣斾负 I 1 I 2 = R 24 R 13 = 3 2 锛2锛夊綋S鍜孲鈥查兘闂悎...
绛旓細涓茶仈鐢甸樆鐨勭瓑鏁堢數闃4涓數闃鐨勫拰 1+4+6+9=20惟 鏈涢噰绾筹紝璋㈣阿
绛旓細鐢辩數璺浘鐪嬩互鐪嬪嚭锛屽洜 R4涔嬭矾涓婃棤鐢垫祦锛岀數瀹瑰櫒涓ゆ瀬鏉块棿鐢靛帇锛屾棤璁篕鏄惁闂悎濮嬬粓绛変簬R3 涓婄殑鐢靛帇锛屽綋K闂悎鏃讹紝璁炬涓ゆ瀬鏉块棿鐢靛帇涓篣锛岀數婧愮數鍔ㄥ娍涓篍锛岀敱鍒嗗帇鍏崇郴鍙緱U=U3=23E 鈶犲皬鐞冨浜庨潤姝㈢姸鎬侊紝鐢卞钩琛℃潯浠跺緱锛氭墍浠 q=3mgd2E 甯︽鐢碉紙2锛夊綋K鏂紑鏃讹紝鐢 R1鍜 R3涓茶仈鍙緱鐢靛涓ゆ瀬鏉块棿鐢靛帇...
绛旓細1.褰揝闂悎锛孲'鏂紑鏃讹紝R1銆丷3涓茶仈鍚庢瀯鎴愪竴鏉℃敮璺紝鐢甸樆涓篟'=R1+R3=4娆,R2銆丷4涓茶仈鍚庢瀯鎴愪竴鏉℃敮璺紝鐢甸樆涓篟"=R2+R4=6娆э紝鏍规嵁骞惰仈鐢佃矾鍚勬敮璺袱绔數鍘嬬浉绛夊緱I1:I2=R":R'=3:2.2.褰揝鍜孲'閮介棴鍚堟椂锛孯1銆丷2骞惰仈锛闃诲间负2/3锛夊悗鍐嶄笌R3銆丷4缁勬垚鐨勫苟鑱旓紙闃诲间负12/7锛夌數璺涓茶仈锛鎬婚樆鍊间负...
绛旓細S闂悎锛孲'鏂紑鏃讹紝閫氳繃R1鍜孯2鐨勭數娴佷箣姣斾负 3:2 瑙i噴濡備笅锛屾鏃禦1鍜孯3涓茶仈锛R4 鍜孯2涓茶仈锛屼箣鍚庝袱缁勫苟鑱旓紝R1+R3=4 R2+R4=6 骞惰仈鐢佃矾 鐢垫祦鍜鐢甸樆鎴愬弽姣 S鍜孲'閮介棴鍚堟椂锛岄氳繃R1鍜孯2鐨勭數娴佷箣姣斾负 2:1 锛屽洜涓烘鏃禦1鍜孯2骞惰仈 姝ゆ椂鐨勬荤數闃讳负2/3+12/7+0.2= 2.58 鐢垫祦涓 4/2.58=1.55...
绛旓細鍥犱负涓茶仈鐢佃矾鎬荤數闃荤瓑浜庡悇閮ㄥ垎鐢甸樆涔嬪拰锛屾墍浠2涓樆鍊间负R鐨勭數闃讳覆鑱旓紝鎬荤數闃荤瓑浜嶳+R=2R锛3涓繖鏍风殑鐢甸樆骞惰仈璧锋潵锛屽叾绛夋晥鐢甸樆1R鎬=1R+1R+1R=3R锛屽垯R鎬=R3锛庢晠绛旀涓猴細2R锛汻3锛
绛旓細锛1锛夌敾鍑绛夋晥鐢佃矾鍥惧鍥炬墍绀猴紟鍒橰3銆丷4骞惰仈鐢甸樆涓猴細R34=R3R4R3+R4=12R3=12脳2惟=1惟鐢佃矾鐨勬荤數闃 R=(R1+R43)R2R1+R34+R2=(2+1)脳22+1+2惟=1.2惟 锛2锛夌敱棰樻剰锛歊1鐨勪袱绔殑鐢靛帇U1=4V锛屾牴鎹涓茶仈鐢佃矾鐢靛帇涓庣數闃绘垚姝f瘮锛屽彲鐭3銆丷4骞惰仈鐢佃矾鐨勭數鍘 U34=0.5U1=2V鍒鐢甸樆R2涓ょ鐨勭數鍘...
绛旓細鍙锛屽浘涓4涓數闃鐨勬绛夋晥鐢甸樆鍊兼槸銆3.5 娆с傜數娴併I1锛滶 / R鎬伙紳42 / 3.5锛12 瀹 鐢垫祦銆I3锛滶 / R鍙筹紳42 / 7锛6 瀹 鐢变簬 3 娆х數闃讳笌 6 娆х數闃诲苟鑱旓紝寰椼R锛2娆э紝杩欎釜2 娆т笌鍥句腑銆R宸︿笅锛5 娆с涓茶仈锛閭d箞 鈥2娆р濈數闃讳袱绔殑鐢靛帇鏄 U锛漑 E /锛圧锛婻宸︿笅锛塢 * R锛漑...