Babban bambance-bambancen da ke tsakanin kewayawar maganadisu da kaddarorin zahirin kewayawa sune kamar haka:
(1) Akwai kyawawan kayan tafiyar da al'adu a cikin yanayi, kuma akwai kuma kayan da ke rufe halin yanzu. Misali, juriya na jan karfe shine 1.69 × 10-2qmm2 / m, yayin da na roba ya ninka sau 10. Amma har ya zuwa yanzu, ba a sami wani abu da ya keɓe motsin maganadisu ba. Bismuth yana da mafi ƙasƙanci m, wanda shine 0. 99982μ. Ƙarfafawar iska shine 1.000038 μ. Don haka ana iya ɗaukar iska azaman abu tare da mafi ƙasƙanci mara kyau. Mafi kyawun kayan ferromagnetic suna da alaƙar iyawar kusan 10 zuwa ƙarfi na shida.
(2) A halin yanzu shine haƙiƙanin kwararar abubuwan da aka caje a cikin madugu. Saboda kasancewar juriyar madugu, ƙarfin lantarki yana aiki akan barbashi da aka caje kuma yana cinye makamashi, kuma asarar wutar ta zama makamashin zafi. Juyin maganadisu baya wakiltar motsin kowane barbashi, kuma baya wakiltar asarar iko, don haka wannan kwatankwacin ba lallai bane. Da’irar wutar lantarki da na’urar maganadisu sun bambanta sosai, kowanne yana da tarin nasa. Asara, don haka kwatancin gurgu ne. Da'irar da da'irar maganadisu sun bambanta da juna, kowanne yana da ma'anarsa ta zahiri ba tare da tambaya ba.
Magnetic da'irori sun fi sauƙi:
(1) Ba za a sami hutun kewayawa a cikin da'irar maganadisu ba, motsin maganadisu yana ko'ina.
(3) Na'urorin Magnetic kusan ko da yaushe ba su da layi. Rashin son kayan ferromagnetic ba shi da tushe, rashin son ratar iska yana da layi. Dokokin maganadisu ohm da ra'ayoyin rashin so da aka jera a sama gaskiya ne kawai a cikin kewayon layi. Sabili da haka, a cikin ƙira mai amfani, yawanci ana amfani da layin bH don ƙididdige wurin aiki.
(2) Tunda babu cikakken abin da ba na maganadisu ba, motsin maganadisu ba shi da iyaka. Sai kawai wani ɓangare na motsin maganadisu yana gudana ta cikin ƙayyadaddun da'irar maganadisu, sauran kuma suna warwatse a sararin da ke kewayen da'irar maganadisu, wanda ake kira leakage na maganadisu. Madaidaicin ƙididdigewa da auna wannan ɗigon ruwan maganadisu yana da wahala, amma ba za a iya yin watsi da su ba.
Lokacin aikawa: Maris-07-2022