91视频专区

晚秋冲晚秋电影手机在线观看免费冲全文阅览57秒模式尘...阿根廷资深艳星当文化大使引轩然大波触艳星触阿根廷触...

牛肉丝炒青椒胡萝卜丝。

2024年12月06日,眼看45天的滞留期限越来越近,而波音这边对于星际客机的故障问题迟迟没有进展,有人猜测,如果时限到达,波音公司和狈础厂础恐怕只能求助马斯克。

晚秋冲晚秋电影手机在线观看免费冲全文阅览57秒模式尘...阿根廷资深艳星当文化大使引轩然大波触艳星触阿根廷触...

随着对人工智能兴趣的增长许多公司和投资者都认为人工智能会出现短缺

值得注意的是第5部:《时光代理人》

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普(笔耻)法(贵补)宣(齿耻补苍)传(颁丑耻补苍)

2024-07-18 16:52·zhibobayangshiwangxiaoxi:zaodaoshiwoguoquannianliangshishouhuodedierji。dangqianzhengshizaodaochousuiyanghuaguanjiangqi,yeshichanliangxingchengdeguanjianqi,erjinqinanfangdegaowen、baoyuheshuidaoyanghua“sanpengtou”,geizaodaoshengchandailaizhuduobuliyingxiang。

教(Jiao)师(Shi)资(Zi)格(Ge)考(Kao)试(Shi)初(Chu)中(Zhong)物(Wu)理(Li)电(Dian)学(Xue)知(Zhi)识(Shi)点(Dian)总(Zong)结(Jie)2017-08-01 14:49·赤(Chi)峰(Feng)中(Zhong)公(Gong)教(Jiao)育(Yu)一(Yi)、电(Dian)荷(He)1.带(Dai)了(Liao)电(Dian)(荷(He)):摩(Mo)擦(Ba)过(Guo)的(De)物(Wu)体(Ti)有(You)了(Liao)吸(Xi)引(Yin)物(Wu)体(Ti)的(De)轻(Qing)小(Xiao)物(Wu)体(Ti)的(De)性(Xing)质(Zhi),我(Wo)们(Men)就(Jiu)说(Shuo)物(Wu)体(Ti)带(Dai)了(Liao)电(Dian)。轻(Qing)小(Xiao)物(Wu)体(Ti)指(Zhi):碎(Sui)纸(Zhi)屑(Xie)、头(Tou)发(Fa)、通(Tong)草(Cao)球(Qiu)、灰(Hui)尘(Chen)、轻(Qing)质(Zhi)球(Qiu)等(Deng)。2.使(Shi)物(Wu)体(Ti)带(Dai)电(Dian)的(De)方(Fang)法(Fa):(1)摩(Mo)擦(Ba)起(Qi)电(Dian)定(Ding)义(Yi):用(Yong)摩(Mo)擦(Ba)的(De)方(Fang)法(Fa)使(Shi)物(Wu)体(Ti)带(Dai)电(Dian)原(Yuan)因(Yin):不(Bu)同(Tong)物(Wu)质(Zhi)原(Yuan)子(Zi)核(He)束(Shu)缚(Fu)电(Dian)子(Zi)的(De)本(Ben)领(Ling)不(Bu)同(Tong)实(Shi)质(Zhi):电(Dian)荷(He)从(Cong)一(Yi)个(Ge)物(Wu)体(Ti)转(Zhuan)移(Yi)到(Dao)另(Ling)一(Yi)个(Ge)物(Wu)体(Ti)上(Shang)能(Neng)量(Liang)的(De)转(Zhuan)化(Hua):机(Ji)械(Xie)能(Neng)-→电(Dian)能(Neng)(2)接(Jie)触(Chu)带(Dai)电(Dian):物(Wu)体(Ti)和(He)带(Dai)电(Dian)体(Ti)接(Jie)触(Chu)带(Dai)了(Liao)电(Dian)。如(Ru)带(Dai)电(Dian)体(Ti)与(Yu)验(Yan)电(Dian)器(Qi)金(Jin)属(Shu)球(Qiu)接(Jie)触(Chu)使(Shi)之(Zhi)带(Dai)电(Dian)。(3)感(Gan)应(Ying)带(Dai)电(Dian):由(You)于(Yu)带(Dai)电(Dian)体(Ti)的(De)作(Zuo)用(Yong),使(Shi)带(Dai)电(Dian)体(Ti)附(Fu)近(Jin)的(De)物(Wu)体(Ti)带(Dai)电(Dian)。3.两(Liang)种(Zhong)电(Dian)荷(He):正(Zheng)电(Dian)荷(He):用(Yong)丝(Si)绸(Chou)摩(Mo)擦(Ba)过(Guo)的(De)玻(Bo)璃(Li)棒(Bang)所(Suo)带(Dai)的(De)电(Dian)叫(Jiao)正(Zheng)电(Dian)荷(He)。负(Fu)电(Dian)荷(He):毛(Mao)皮(Pi)摩(Mo)擦(Ba)过(Guo)的(De)橡(Xiang)胶(Jiao)棒(Bang)所(Suo)带(Dai)的(De)电(Dian)叫(Jiao)负(Fu)电(Dian)荷(He)。4.电(Dian)荷(He)间(Jian)的(De)相(Xiang)互(Hu)作(Zuo)用(Yong)规(Gui)律(Lv):同(Tong)种(Zhong)电(Dian)荷(He)相(Xiang)互(Hu)排(Pai)斥(Chi),异(Yi)种(Zhong)电(Dian)荷(He)相(Xiang)互(Hu)吸(Xi)引(Yin)。5.中(Zhong)和(He):放(Fang)在(Zai)一(Yi)起(Qi)的(De)等(Deng)量(Liang)异(Yi)种(Zhong)电(Dian)荷(He)完(Wan)全(Quan)抵(Di)消(Xiao)的(De)现(Xian)象(Xiang)。拓(Tuo)展(Zhan):①如(Ru)果(Guo)物(Wu)体(Ti)所(Suo)带(Dai)正(Zheng)、负(Fu)电(Dian)量(Liang)不(Bu)等(Deng),也(Ye)会(Hui)发(Fa)生(Sheng)中(Zhong)和(He)现(Xian)象(Xiang)。这(Zhe)时(Shi),带(Dai)电(Dian)量(Liang)多(Duo)的(De)物(Wu)体(Ti)先(Xian)用(Yong)部(Bu)分(Fen)电(Dian)荷(He)和(He)带(Dai)电(Dian)量(Liang)少(Shao)的(De)物(Wu)体(Ti)中(Zhong)和(He),剩(Sheng)余(Yu)的(De)电(Dian)荷(He)可(Ke)使(Shi)两(Liang)物(Wu)体(Ti)带(Dai)同(Tong)种(Zhong)电(Dian)荷(He)。②中(Zhong)和(He)不(Bu)是(Shi)意(Yi)味(Wei)着(Zhuo)等(Deng)量(Liang)正(Zheng)负(Fu)电(Dian)荷(He)被(Bei)消(Xiao)灭(Mie),实(Shi)际(Ji)上(Shang)电(Dian)荷(He)总(Zong)量(Liang)保(Bao)持(Chi)不(Bu)变(Bian),只(Zhi)是(Shi)等(Deng)量(Liang)的(De)正(Zheng)负(Fu)电(Dian)荷(He)使(Shi)物(Wu)体(Ti)整(Zheng)体(Ti)显(Xian)不(Bu)出(Chu)电(Dian)性(Xing)。二(Er)、探(Tan)究(Jiu)电(Dian)路(Lu)(一(Yi))电(Dian)阻(Zu)1.定(Ding)义(Yi):导(Dao)体(Ti)对(Dui)电(Dian)流(Liu)的(De)阻(Zu)碍(Ai)作(Zuo)用(Yong),符(Fu)号(Hao)R;2.单(Dan)位(Wei):Ω(欧(Ou)姆(Mu))。换(Huan)算(Suan)关(Guan)系(Xi):1兆(Zhao)欧(Ou)=1000千(Qian)欧(Ou),1千(Qian)欧(Ou)=1000欧(Ou);3.影(Ying)响(Xiang)电(Dian)阻(Zu)大(Da)小(Xiao)的(De)因(Yin)素(Su):导(Dao)体(Ti)的(De)电(Dian)阻(Zu)是(Shi)导(Dao)体(Ti)本(Ben)身(Shen)的(De)性(Xing)质(Zhi),其(Qi)大(Da)小(Xiao)由(You)导(Dao)体(Ti)的(De)材(Cai)料(Liao)、长(Chang)度(Du)和(He)横(Heng)截(Jie)面(Mian)积(Ji)以(Yi)及(Ji)温(Wen)度(Du)有(You)关(Guan)。与(Yu)导(Dao)体(Ti)中(Zhong)是(Shi)否(Fou)有(You)电(Dian)流(Liu)、两(Liang)端(Duan)是(Shi)否(Fou)有(You)电(Dian)压(Ya)无(Wu)关(Guan)。4.变(Bian)阻(Zu)原(Yuan)理(Li):变(Bian)阻(Zu)器(Qi)是(Shi)靠(Kao)改(Gai)变(Bian)电(Dian)路(Lu)只(Zhi)能(Neng)够(Gou)的(De)电(Dian)阻(Zu)线(Xian)长(Chang)度(Du)来(Lai)改(Gai)变(Bian)电(Dian)阻(Zu)的(De)。5.滑(Hua)动(Dong)变(Bian)阻(Zu)器(Qi):连(Lian)入(Ru)电(Dian)路(Lu)中(Zhong)的(De)阻(Zu)值(Zhi)大(Da)小(Xiao)可(Ke)以(Yi)改(Gai)变(Bian)的(De)器(Qi)件(Jian)。(1)原(Yuan)理(Li):滑(Hua)动(Dong)滑(Hua)片(Pian)(P)改(Gai)变(Bian)电(Dian)阻(Zu)线(Xian)连(Lian)入(Ru)电(Dian)路(Lu)中(Zhong)的(De)长(Chang)度(Du)来(Lai)改(Gai)变(Bian)连(Lian)入(Ru)电(Dian)路(Lu)中(Zhong)的(De)阻(Zu)值(Zhi)。(注(Zhu):没(Mei)改(Gai)变(Bian)它(Ta)自(Zi)身(Shen)的(De)总(Zong)阻(Zu)值(Zhi))(2)作(Zuo)用(Yong):a.保(Bao)护(Hu)电(Dian)路(Lu);b.通(Tong)过(Guo)改(Gai)变(Bian)接(Jie)入(Ru)电(Dian)路(Lu)中(Zhong)的(De)电(Dian)阻(Zu)来(Lai)改(Gai)变(Bian)电(Dian)路(Lu)中(Zhong)的(De)电(Dian)流(Liu)或(Huo)者(Zhe)各(Ge)个(Ge)电(Dian)阻(Zu)之(Zhi)间(Jian)的(De)电(Dian)压(Ya)分(Fen)配(Pei)关(Guan)系(Xi)。(3)铭(Ming)牌(Pai):如(Ru)一(Yi)个(Ge)滑(Hua)动(Dong)变(Bian)阻(Zu)器(Qi)标(Biao)有(You)“50Ω 2A”表(Biao)示(Shi)的(De)意(Yi)义(Yi)是(Shi):最(Zui)大(Da)阻(Zu)值(Zhi)是(Shi)50Ω,允(Yun)许(Xu)通(Tong)过(Guo)的(De)最(Zui)大(Da)电(Dian)流(Liu)是(Shi)2A。(4)正(Zheng)确(Que)使(Shi)用(Yong):a、应(Ying)串(Chuan)联(Lian)在(Zai)被(Bei)控(Kong)制(Zhi)电(Dian)路(Lu)中(Zhong)使(Shi)用(Yong)(即(Ji)要(Yao)控(Kong)制(Zhi)谁(Shui)则(Ze)与(Yu)谁(Shui)串(Chuan)联(Lian);反(Fan)之(Zhi),与(Yu)谁(Shui)串(Chuan)联(Lian)则(Ze)表(Biao)示(Shi)控(Kong)制(Zhi)谁(Shui)的(De)电(Dian)流(Liu)); b、接(Jie)线(Xian)柱(Zhu)要(Yao)“一(Yi)上(Shang)一(Yi)下(Xia)”; c、闭(Bi)合(He)开(Kai)关(Guan)前(Qian)应(Ying)把(Ba)滑(Hua)片(Pian)调(Diao)至(Zhi)阻(Zu)值(Zhi)最(Zui)大(Da)的(De)位(Wei)置(Zhi)。6.电(Dian)阻(Zu)箱(Xiang):①作(Zuo)用(Yong)和(He)滑(Hua)动(Dong)变(Bian)阻(Zu)器(Qi)相(Xiang)同(Tong);②原(Yuan)理(Li)与(Yu)滑(Hua)动(Dong)变(Bian)阻(Zu)器(Qi)不(Bu)相(Xiang)同(Tong),③使(Shi)用(Yong)方(Fang)法(Fa):连(Lian)接(Jie)方(Fang)式(Shi)与(Yu)滑(Hua)动(Dong)变(Bian)阻(Zu)器(Qi)相(Xiang)同(Tong),连(Lian)入(Ru)电(Dian)路(Lu)的(De)阻(Zu)值(Zhi)大(Da)小(Xiao)=刻(Ke)度(Du)盘(Pan)指(Zhi)针(Zhen)所(Suo)指(Zhi)数(Shu)字(Zi)×对(Dui)应(Ying)倍(Bei)数(Shu)之(Zhi)和(He)。(二(Er))欧(Ou)姆(Mu)定(Ding)律(Lv)1.欧(Ou)姆(Mu)定(Ding)律(Lv):导(Dao)体(Ti)中(Zhong)的(De)电(Dian)流(Liu),跟(Gen)导(Dao)体(Ti)两(Liang)端(Duan)的(De)电(Dian)压(Ya)成(Cheng)正(Zheng)比(Bi),跟(Gen)导(Dao)体(Ti)的(De)电(Dian)阻(Zu)成(Cheng)反(Fan)比(Bi)。强(Qiang)调(Diao):此(Ci)结(Jie)论(Lun)绝(Jue)对(Dui)不(Bu)能(Neng)倒(Dao)过(Guo)来(Lai)说(Shuo)。2.公(Gong)式(Shi):式(Shi)中(Zhong)单(Dan)位(Wei): I→安(An)(A); U→伏(Fu)(V); R→欧(Ou)(Ω)。3.公(Gong)式(Shi)的(De)理(Li)解(Jie):①公(Gong)式(Shi)中(Zhong)的(De)I、U、R必(Bi)须(Xu)对(Dui)于(Yu)同(Tong)一(Yi)导(Dao)体(Ti)(同(Tong)一(Yi)段(Duan)电(Dian)路(Lu))的(De)同(Tong)一(Yi)过(Guo)程(Cheng)(即(Ji)要(Yao)满(Man)足(Zu)“同(Tong)一(Yi)性(Xing)”),才(Cai)能(Neng)代(Dai)入(Ru)公(Gong)式(Shi)中(Zhong)计(Ji)算(Suan);②I、U和(He)R中(Zhong)已(Yi)知(Zhi)任(Ren)意(Yi)的(De)两(Liang)个(Ge)量(Liang)就(Jiu)可(Ke)求(Qiu)另(Ling)一(Yi)个(Ge)量(Liang);③计(Ji)算(Suan)时(Shi)单(Dan)位(Wei)要(Yao)统(Tong)一(Yi)。4.欧(Ou)姆(Mu)定(Ding)律(Lv)的(De)应(Ying)用(Yong):①同(Tong)一(Yi)电(Dian)阻(Zu)的(De)阻(Zu)值(Zhi)不(Bu)变(Bian),与(Yu)电(Dian)流(Liu)和(He)电(Dian)压(Ya)无(Wu)关(Guan),,其(Qi)电(Dian)流(Liu)随(Sui)电(Dian)压(Ya)增(Zeng)大(Da)而(Er)增(Zeng)大(Da)。(R=U/I只(Zhi)是(Shi)R的(De)确(Que)定(Ding)式(Shi),而(Er)不(Bu)是(Shi)决(Jue)定(Ding)式(Shi)) 。②当(Dang)电(Dian)压(Ya)不(Bu)变(Bian)时(Shi),电(Dian)阻(Zu)越(Yue)大(Da),则(Ze)通(Tong)过(Guo)的(De)电(Dian)流(Liu)就(Jiu)越(Yue)小(Xiao)。(I=U/R)③当(Dang)电(Dian)流(Liu)一(Yi)定(Ding)时(Shi),电(Dian)阻(Zu)越(Yue)大(Da),则(Ze)电(Dian)阻(Zu)两(Liang)端(Duan)的(De)电(Dian)压(Ya)就(Jiu)越(Yue)大(Da)。(U=IR)5.电(Dian)阻(Zu)的(De)串(Chuan)联(Lian)有(You)以(Yi)下(Xia)几(Ji)个(Ge)特(Te)点(Dian):①电(Dian)流(Liu):I=I1=I2(串(Chuan)联(Lian)电(Dian)路(Lu)中(Zhong)各(Ge)处(Chu)的(De)电(Dian)流(Liu)相(Xiang)等(Deng))②电(Dian)压(Ya):U=U1+U2(串(Chuan)联(Lian)电(Dian)路(Lu)中(Zhong)总(Zong)电(Dian)压(Ya)等(Deng)于(Yu)各(Ge)部(Bu)分(Fen)电(Dian)路(Lu)电(Dian)压(Ya)之(Zhi)和(He))③电(Dian)阻(Zu):R=R1+R2(串(Chuan)联(Lian)电(Dian)路(Lu)中(Zhong)总(Zong)电(Dian)阻(Zu)等(Deng)于(Yu)各(Ge)串(Chuan)联(Lian)电(Dian)阻(Zu)之(Zhi)和(He));如(Ru)果(Guo)n个(Ge)等(Deng)值(Zhi)电(Dian)阻(Zu)(R)串(Chuan)联(Lian),则(Ze)有(You)R总(Zong)=nR注(Zhu):总(Zong)电(Dian)阻(Zu)比(Bi)任(Ren)何(He)一(Yi)个(Ge)分(Fen)电(Dian)阻(Zu)都(Du)大(Da),其(Qi)原(Yuan)因(Yin)是(Shi)电(Dian)阻(Zu)串(Chuan)联(Lian)相(Xiang)当(Dang)于(Yu)增(Zeng)加(Jia)了(Liao)导(Dao)体(Ti)的(De)长(Chang)度(Du);实(Shi)际(Ji)意(Yi)义(Yi):用(Yong)多(Duo)个(Ge)小(Xiao)电(Dian)阻(Zu)串(Chuan)联(Lian)起(Qi)来(Lai)代(Dai)替(Ti)大(Da)电(Dian)阻(Zu)。④分(Fen)压(Ya)作(Zuo)用(Yong):U1/U2=R1/R2(阻(Zu)值(Zhi)越(Yue)大(Da)的(De)电(Dian)阻(Zu)分(Fen)得(De)电(Dian)压(Ya)越(Yue)多(Duo),反(Fan)之(Zhi)分(Fen)得(De)电(Dian)压(Ya)越(Yue)少(Shao))⑤比(Bi)例(Li)关(Guan)系(Xi):在(Zai)串(Chuan)联(Lian)电(Dian)路(Lu)中(Zhong),电(Dian)流(Liu)对(Dui)各(Ge)部(Bu)分(Fen)电(Dian)路(Lu)(用(Yong)电(Dian)器(Qi))所(Suo)做(Zuo)的(De)功(Gong)、产(Chan)生(Sheng)的(De)热(Re)量(Liang)、做(Zuo)功(Gong)的(De)功(Gong)率(Lv)与(Yu)其(Qi)电(Dian)阻(Zu)成(Cheng)正(Zheng)比(Bi),即(Ji) W1/W2=Q1/Q2=P1/P2=R1/R2 U1/U2=R1/R26.电(Dian)阻(Zu)的(De)并(Bing)联(Lian)有(You)以(Yi)下(Xia)几(Ji)个(Ge)特(Te)点(Dian):(指(Zhi)R1、R2并(Bing)联(Lian),并(Bing)得(De)越(Yue)多(Duo),总(Zong)电(Dian)阻(Zu)越(Yue)小(Xiao))①电(Dian)流(Liu):I=I1+I2(干(Gan)路(Lu)电(Dian)流(Liu)等(Deng)于(Yu)各(Ge)支(Zhi)路(Lu)电(Dian)流(Liu)之(Zhi)和(He))②电(Dian)压(Ya):U=U1=U2(干(Gan)路(Lu)电(Dian)压(Ya)等(Deng)于(Yu)各(Ge)支(Zhi)路(Lu)电(Dian)压(Ya))③电(Dian)阻(Zu):1/R=1/R1+1/R2 (总(Zong)电(Dian)阻(Zu)的(De)倒(Dao)数(Shu)等(Deng)于(Yu)各(Ge)支(Zhi)路(Lu)电(Dian)阻(Zu)的(De)倒(Dao)数(Shu)之(Zhi)和(He));注(Zhu):总(Zong)电(Dian)阻(Zu)比(Bi)任(Ren)何(He)一(Yi)个(Ge)分(Fen)电(Dian)阻(Zu)都(Du)小(Xiao),其(Qi)原(Yuan)因(Yin)是(Shi)电(Dian)阻(Zu)并(Bing)联(Lian)相(Xiang)当(Dang)于(Yu)增(Zeng)加(Jia)了(Liao)导(Dao)体(Ti)的(De)横(Heng)截(Jie)面(Mian)积(Ji);实(Shi)际(Ji)意(Yi)义(Yi):用(Yong)多(Duo)个(Ge)大(Da)电(Dian)阻(Zu)并(Bing)联(Lian)起(Qi)来(Lai)代(Dai)替(Ti)小(Xiao)电(Dian)阻(Zu)。变(Bian)形(Xing)式(Shi) R=R1.R2/(R1+R2)此(Ci)变(Bian)形(Xing)式(Shi)只(Zhi)适(Shi)用(Yong)于(Yu)两(Liang)个(Ge)电(Dian)阻(Zu)并(Bing)联(Lian)的(De)情(Qing)况(Kuang),多(Duo)于(Yu)两(Liang)个(Ge)电(Dian)阻(Zu)并(Bing)联(Lian)则(Ze)不(Bu)适(Shi)用(Yong)。如(Ru)果(Guo)n个(Ge)等(Deng)值(Zhi)(R)电(Dian)阻(Zu)并(Bing)联(Lian),则(Ze)有(You)R总(Zong)=R/n④分(Fen)流(Liu)作(Zuo)用(Yong):I1/I2=R2/R1(阻(Zu)值(Zhi)越(Yue)大(Da)的(De)电(Dian)阻(Zu)分(Fen)得(De)电(Dian)流(Liu)越(Yue)少(Shao),反(Fan)之(Zhi)分(Fen)得(De)电(Dian)流(Liu)越(Yue)多(Duo))⑤比(Bi)例(Li)关(Guan)系(Xi):在(Zai)并(Bing)联(Lian)电(Dian)路(Lu)中(Zhong),电(Dian)流(Liu)对(Dui)各(Ge)部(Bu)分(Fen)电(Dian)路(Lu)(用(Yong)电(Dian)器(Qi))所(Suo)做(Zuo)的(De)功(Gong)、产(Chan)生(Sheng)的(De)热(Re)量(Liang)、做(Zuo)功(Gong)的(De)功(Gong)率(Lv)与(Yu)其(Qi)电(Dian)阻(Zu)成(Cheng)反(Fan)比(Bi),即(Ji)W1/W2=Q1/Q2=P1/P2=R2/R1 I1/I2=R2/R1三(San)、生(Sheng)活(Huo)用(Yong)电(Dian)1.家(Jia)庭(Ting)电(Dian)路(Lu)的(De)组(Zu)成(Cheng):进(Jin)户(Hu)线(Xian)(火(Huo)线(Xian)和(He)零(Ling)线(Xian))→电(Dian)能(Neng)表(Biao)→总(Zong)开(Kai)关(Guan)→保(Bao)险(Xian)盒(He)→用(Yong)电(Dian)器(Qi)(插(Cha)座(Zuo))。2.所(Suo)有(You)家(Jia)用(Yong)电(Dian)器(Qi)和(He)插(Cha)座(Zuo)之(Zhi)间(Jian)都(Du)是(Shi)并(Bing)联(Lian)的(De)。而(Er)用(Yong)电(Dian)器(Qi)要(Yao)与(Yu)它(Ta)的(De)开(Kai)关(Guan)串(Chuan)联(Lian)接(Jie)火(Huo)线(Xian);且(Qie)开(Kai)关(Guan)接(Jie)靠(Kao)近(Jin)火(Huo)线(Xian)那(Na)一(Yi)端(Duan)。3.保(Bao)险(Xian)丝(Si):是(Shi)用(Yong)电(Dian)阻(Zu)率(Lv)大(Da),熔(Rong)点(Dian)低(Di)的(De)铅(Qian)锑(Ti)合(He)金(Jin)制(Zhi)成(Cheng)。它(Ta)的(De)作(Zuo)用(Yong)是(Shi):当(Dang)电(Dian)路(Lu)中(Zhong)有(You)过(Guo)大(Da)的(De)电(Dian)流(Liu)时(Shi),它(Ta)升(Sheng)温(Wen)达(Da)到(Dao)熔(Rong)点(Dian)而(Er)熔(Rong)断(Duan),自(Zi)动(Dong)切(Qie)断(Duan)电(Dian)路(Lu),起(Qi)到(Dao)保(Bao)险(Xian)的(De)作(Zuo)用(Yong),保(Bao)险(Xian)丝(Si)串(Chuan)联(Lian)在(Zai)干(Gan)路(Lu)火(Huo)线(Xian)上(Shang)。4.三(San)孔(Kong)插(Cha)座(Zuo)与(Yu)两(Liang)孔(Kong)插(Cha)座(Zuo)的(De)区(Qu)别(Bie)和(He)连(Lian)接(Jie)方(Fang)法(Fa):三(San)孔(Kong)插(Cha)座(Zuo)多(Duo)的(De)一(Yi)孔(Kong)与(Yu)大(Da)地(Di)连(Lian)接(Jie),三(San)脚(Jiao)插(Cha)头(Tou)多(Duo)的(De)一(Yi)脚(Jiao)与(Yu)用(Yong)电(Dian)器(Qi)金(Jin)属(Shu)外(Wai)壳(Ke)连(Lian)接(Jie)。5.电(Dian)笔(Bi)的(De)作(Zuo)用(Yong)和(He)使(Shi)用(Yong)方(Fang)法(Fa):手(Shou)必(Bi)须(Xu)与(Yu)笔(Bi)尾(Wei)金(Jin)属(Shu)体(Ti)接(Jie)触(Chu)(氖(Nai)管(Guan)发(Fa)光(Guang)则(Ze)为(Wei)火(Huo)线(Xian),氖(Nai)管(Guan)不(Bu)发(Fa)光(Guang)则(Ze)为(Wei)零(Ling)线(Xian))6.低(Di)压(Ya)电(Dian)路(Lu)中(Zhong)的(De)触(Chu)电(Dian)形(Xing)式(Shi):单(Dan)线(Xian)触(Chu)电(Dian),双(Shuang)线(Xian)触(Chu)电(Dian)7.引(Yin)起(Qi)电(Dian)路(Lu)电(Dian)流(Liu)过(Guo)大(Da)的(De)两(Liang)个(Ge)原(Yuan)因(Yin):一(Yi)是(Shi)电(Dian)路(Lu)发(Fa)生(Sheng)短(Duan)路(Lu);二(Er)是(Shi)同(Tong)时(Shi)工(Gong)作(Zuo)的(De)用(Yong)电(Dian)器(Qi)总(Zong)功(Gong)率(Lv)过(Guo)大(Da)(I总(Zong)=P总(Zong)/U)。8.安(An)全(Quan)用(Yong)电(Dian)的(De)原(Yuan)则(Ze)是(Shi):①不(Bu)接(Jie)触(Chu)低(Di)压(Ya)带(Dai)电(Dian)体(Ti);②不(Bu)靠(Kao)近(Jin)高(Gao)压(Ya)带(Dai)电(Dian)体(Ti)。

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