工頻(pin)電(dian)(dian)(dian)(dian)場(chang)指按50Hz或(huo)60Hz隨時(shi)間正弦(xian)變化的電(dian)(dian)(dian)(dian)荷(he)(he)產(chan)(chan)生(sheng)的電(dian)(dian)(dian)(dian)場(chang)。其特點(dian)包括：電(dian)(dian)(dian)(dian)力(li)線(xian)呈現為始于(yu)正電(dian)(dian)(dian)(dian)荷(he)(he)、終于(yu)負(fu)電(dian)(dian)(dian)(dian)荷(he)(he)的非(fei)閉合曲線(xian)；由電(dian)(dian)(dian)(dian)荷(he)(he)產(chan)(chan)生(sheng)，而幾乎(hu)與磁(ci)場(chang)無關；其變化產(chan)(chan)生(sheng)的磁(ci)場(chang)幾乎(hu)為零；波(bo)長為6000千米或(huo)5000千米，其系統的尺度(du)遠遠小(xiao)于(yu)波(bo)長，不產(chan)(chan)生(sheng)電(dian)(dian)(dian)(dian)磁(ci)輻射；可(ke)以采(cai)用靜(jing)電(dian)(dian)(dian)(dian)場(chang)的計算方法進(jin)行計算；“點(dian)”結構(gou)的電(dian)(dian)(dian)(dian)場(chang)強度(du)隨距離(li)平(ping)方的倒數衰減，“線(xian)”結構(gou)的電(dian)(dian)(dian)(dian)場(chang)強度(du)隨距離(li)的倒數衰減。

特點：

（1）電(dian)力線呈現為始于正電(dian)荷、終于負電(dian)荷的非閉合曲線；

（2）由電荷產生，而幾(ji)乎與磁(ci)場(chang)無關；

（3）其變化產生的磁場幾乎為零；

（4）波(bo)長為6000千(qian)米(mi)或5000千(qian)米(mi)，其系統的尺度(du)遠遠小于(yu)波(bo)長，不產生電磁輻射；

（5）可以采用靜電(dian)場的計算方法(fa)進行計算；

（6）“點”結構的電(dian)場強(qiang)度隨距(ju)離(li)(li)平(ping)方的倒(dao)數衰減(jian)，“線”結構的電(dian)場強(qiang)度隨距(ju)離(li)(li)的倒(dao)數衰減(jian)。