電流表內外接(jie)法(fa)產生誤差的原(yuan)因

當選用外(wai)接(jie)法時，電(dian)(dian)(dian)(dian)(dian)壓(ya)表(biao)(biao)與電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)并(bing)(bing)聯，電(dian)(dian)(dian)(dian)(dian)壓(ya)表(biao)(biao)的(de)(de)(de)讀數就(jiu)是電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)兩端的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)壓(ya)，但電(dian)(dian)(dian)(dian)(dian)流表(biao)(biao)測(ce)量(liang)的(de)(de)(de)是通(tong)過電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)和電(dian)(dian)(dian)(dian)(dian)壓(ya)表(biao)(biao)的(de)(de)(de)總電(dian)(dian)(dian)(dian)(dian)流，正泰(tai)電(dian)(dian)(dian)(dian)(dian)流表(biao)(biao)價格，因此測(ce)量(liang)值要小(xiao)(xiao)于真實值，實際上(shang)測(ce)量(liang)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)值是電(dian)(dian)(dian)(dian)(dian)壓(ya)表(biao)(biao)內電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)和電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)并(bing)(bing)聯的(de)(de)(de)阻(zu)(zu)(zu)(zu)值。如果電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)Rx的(de)(de)(de)值遠小(xiao)(xiao)于電(dian)(dian)(dian)(dian)(dian)壓(ya)表(biao)(biao)的(de)(de)(de)內阻(zu)(zu)(zu)(zu)RV，電(dian)(dian)(dian)(dian)(dian)壓(ya)表(biao)(biao)分去(qu)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流很小(xiao)(xiao)，這(zhe)時電(dian)(dian)(dian)(dian)(dian)流表(biao)(biao)測(ce)量(liang)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流就(jiu)接(jie)近于通(tong)過電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)流，所以外(wai)接(jie)法適(shi)合于測(ce)小(xiao)(xiao)電(dian)(dian)(dian)(dian)(dian)阻(zu)(zu)(zu)(zu)。

明(ming)泰(tai)電(dian)(dian)(dian)(dian)(dian)(dian)氣（蘇(su)(su)州）有限公司是正泰(tai)集(ji)團在(zai)蘇(su)(su)州地區一家授權的經銷(xiao)企(qi)業，連續十年銷(xiao)量居正泰(tai)營銷(xiao)網(wang)絡名，淮安(an)正泰(tai)電(dian)(dian)(dian)(dian)(dian)(dian)流表，公司主(zhu)要經營“正泰(tai)”牌配電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、控制電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、終端電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、電(dian)(dian)(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、電(dian)(dian)(dian)(dian)(dian)(dian)力(li)電(dian)(dian)(dian)(dian)(dian)(dian)子、儀(yi)器(qi)(qi)(qi)儀(yi)表、建(jian)筑電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)、高壓電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)(qi)及成套設(she)備(bei)。

當有電(dian)流通過(guo)(guo)時，電(dian)流沿彈簧、轉軸(zhou)通過(guo)(guo)磁(ci)場，電(dian)流切(qie)磁(ci)感線(xian)，正泰電(dian)流表廠家，所以(yi)(yi)受磁(ci)場力的作用，使線(xian)圈發生偏轉，帶動轉軸(zhou)、指針(zhen)偏轉。由于(yu)磁(ci)場力的大小隨(sui)電(dian)流增大而(er)增大，所以(yi)(yi)就(jiu)可以(yi)(yi)通過(guo)(guo)指針(zhen)的偏轉程度來觀察電(dian)流的大小。這叫磁(ci)電(dian)式電(dian)流表，就(jiu)是我們平時實驗室里用的那種。在初中時期，所用電(dian)流表量程一般為0~0.6A和0~3A

明泰電(dian)(dian)(dian)氣（蘇州）有限(xian)公司是(shi)正泰集團在蘇州地(di)區一(yi)家授(shou)權(quan)的經銷(xiao)企業，連(lian)續十年銷(xiao)量居正泰營(ying)銷(xiao)網絡名，正泰電(dian)(dian)(dian)流表(biao)報價，公司主(zhu)要經營(ying)“正泰”牌配(pei)電(dian)(dian)(dian)電(dian)(dian)(dian)器、控制電(dian)(dian)(dian)器、終(zhong)端電(dian)(dian)(dian)器、電(dian)(dian)(dian)源(yuan)電(dian)(dian)(dian)器、電(dian)(dian)(dian)力(li)電(dian)(dian)(dian)子(zi)、儀(yi)(yi)器儀(yi)(yi)表(biao)、建筑電(dian)(dian)(dian)器、高(gao)壓(ya)電(dian)(dian)(dian)器及成套設(she)備。

發展過程

威廉(lian)·愛德(de)華(hua)·韋伯(bo)在電(dian)(dian)磁學上(shang)的(de)(de)(de)(de)(de)貢(gong)獻是(shi)多(duo)方面(mian)的(de)(de)(de)(de)(de)。他為了(le)(le)(le)(le)進行研(yan)究，他發(fa)明(ming)了(le)(le)(le)(le)許多(duo)電(dian)(dian)磁儀(yi)器。1841年發(fa)明(ming)了(le)(le)(le)(le)既可(ke)測(ce)量(liang)(liang)地(di)磁強(qiang)(qiang)度(du)(du)又(you)可(ke)測(ce)量(liang)(liang)電(dian)(dian)流強(qiang)(qiang)度(du)(du)的(de)(de)(de)(de)(de)絕(jue)隊電(dian)(dian)磁學單(dan)(dan)位(wei)(wei)(wei)的(de)(de)(de)(de)(de)雙線(xian)電(dian)(dian)流表(biao)；1846年發(fa)明(ming)了(le)(le)(le)(le)既可(ke)用來確定(ding)電(dian)(dian)流強(qiang)(qiang)度(du)(du)的(de)(de)(de)(de)(de)電(dian)(dian)動(dong)(dong)力學單(dan)(dan)位(wei)(wei)(wei)又(you)可(ke)用來測(ce)量(liang)(liang)交流電(dian)(dian)功率的(de)(de)(de)(de)(de)電(dian)(dian)功率表(biao)；1853年發(fa)明(ming)了(le)(le)(le)(le)測(ce)量(liang)(liang)地(di)磁強(qiang)(qiang)度(du)(du)垂直分量(liang)(liang)的(de)(de)(de)(de)(de)地(di)磁感應器。韋伯(bo)在建(jian)立電(dian)(dian)學單(dan)(dan)位(wei)(wei)(wei)的(de)(de)(de)(de)(de)絕(jue)隊測(ce)量(liang)(liang)方面(mian)卓有成效。他提(ti)出了(le)(le)(le)(le)電(dian)(dian)流強(qiang)(qiang)度(du)(du)、電(dian)(dian)量(liang)(liang)和電(dian)(dian)動(dong)(dong)勢的(de)(de)(de)(de)(de)絕(jue)隊單(dan)(dan)位(wei)(wei)(wei)和測(ce)量(liang)(liang)方法；根據安培(pei)的(de)(de)(de)(de)(de)電(dian)(dian)動(dong)(dong)力學公式提(ti)出了(le)(le)(le)(le)電(dian)(dian)流強(qiang)(qiang)度(du)(du)的(de)(de)(de)(de)(de)電(dian)(dian)動(dong)(dong)力學單(dan)(dan)位(wei)(wei)(wei)；還提(ti)出了(le)(le)(le)(le)電(dian)(dian)阻的(de)(de)(de)(de)(de)絕(jue)單(dan)(dan)位(wei)(wei)(wei)。韋伯(bo)與柯爾勞施合(he)作測(ce)定(ding)了(le)(le)(le)(le)電(dian)(dian)量(liang)(liang)的(de)(de)(de)(de)(de)電(dian)(dian)磁單(dan)(dan)位(wei)(wei)(wei)對靜(jing)電(dian)(dian)單(dan)(dan)位(wei)(wei)(wei)的(de)(de)(de)(de)(de)比(bi)值，發(fa)現(xian)這個比(bi)值等于(yu)(yu)3×10^8m/s，接(jie)近于(yu)(yu)光速。