在交流電路中,由電源供給負載的電功率有兩種:一(yi)種(zhong)是(shi)有(you)功(gong)功(gong)率(lv),一(yi)種(zhong)是(shi)無(wu)功(gong)功(gong)率(lv)。電(dian)壓(ya)電(dian)流(liu)同(tong)相(xiang)位(wei),電(dian)源(yuan)向(xiang)負(fu)載(zai)供(gong)電(dian),負(fu)載(zai)把(ba)電(dian)能(neng)轉(zhuan)換(huan)成(cheng)其(qi)他(ta)能(neng)量(liang),叫(jiao)有(you)功(gong)。電(dian)壓(ya)電(dian)流(liu)不(bu)同(tong)相(xiang)位(wei)部(bu)分(fen),電(dian)源(yuan)與(yu)負(fu)載(zai)之(zhi)間(jian)交(jiao)換(huan)電(dian)能(neng),這(zhe)部(bu)分(fen)(除線...