Kudzivirira kwesimba reElectromotive (EMF) mumagetsi ekupedzisira
Mwenje wemagetsi unoyerera mudenderedzwa rakavharwa, kubva pakukwanisa kukuru kuenda pakukwanisa kushoma. Kana magetsi achifamba nepakati pechinhu chinodzivisa magetsi , pane kudzikira kwesimba remagetsi nekuti simba remagetsi rinoshandiswa mukugona. Kuti uve nechokwadi chekuti magetsi anoramba achiyerera kubva pakukwanisa kukuru kuenda pakukwanisa kushoma, panofanira kunge paine mudziyo wekuwedzera simba remagetsi, senge electromotive force (EMF), kana kuti, sosi yemagetsi. EMF kana sosi yemagetsi ichinhu chinoshandura rudzi rwesimba kuita simba remagetsi, semuenzaniso bhatiri, accumulator, solar cell, kana jenareta remagetsi.
Kunobva magetsi emagetsi (emf)
Mufananidzo uri padivi uri mufananidzo uri nyore wedunhu rakavharwa rine emf (ε) uye resistance (R). Mutsetse murefu wakamira panobva emf unomiririra kugona kukuru ukuwo mutsetse mupfupi wakamira uchimiririra kugona kwakaderera. Kuchaja kwemagetsi kunofamba kubva pakukwanisa kukuru kuenda pakukwanisa kwakaderera. Kuchaja kwemagetsi kunofamba kwenguva yakati kunonzi magetsi, uko kutungamira kwemagetsi kunoratidzwa nemuseve.
Kana paine simba guru, chaji ine simba guru remagetsi. Simba guru remagetsi rinodzikira sezvo chaji ichifamba nepakati pe resistor. Kana chaji ichifamba mu emf source kubva pa low potential kuenda pa high potential, simba guru remagetsi rinowedzera.
Zvipingamupinyi zviri mu
Kana chaji yemagetsi ichifamba kubva pane simba remagetsi rishoma kuenda pane simba remagetsi, chaji yacho inoramba kushanda. Masimba emagetsi chaiwo anowanzova ne zvipingamupinyi zvemukati, iyo inoratidzwa nechiratidzo r. Kana chaji yemagetsi ichipfuura nepakati zvipingamupinyi zvemukati (r), pane kudzikira kwesimba remagetsi kana kuti simba remagetsi rinodzikira.
Voltage yemagetsi
Voltage yemagetsi (V) kana kuti clamping voltage ivoltage yemagetsi inogadzirwa nemagetsi kana emf source. Pamasvomhu, inoratidzwa kuburikidza ne equation:
V = ε – I r
Information :
V = Voltage yemagetsi, ε = emf, I = magetsi emagetsi, r = kudzivirira kwemukati.
Kana bhatiri re12 Volt riine resistance yemukati ye0,2 Ω saka kana current ye2 A ichiyerera kubva mubhatiri, voltage yeterminal i12 – (0,2)(2) = 12 – 0,4 = 11,6 Volts.
Kana pasina magetsi anoyerera kubva mubhatiri, voltage yemagetsi = emf. Semuenzaniso, kana emf iri 12 volts, zvinoreva kuti voltage yemagetsi i12 volts. Kana magetsi achiyerera kubva kunobva emf, voltage yemagetsi ishoma pane emf.
EMF ivoltage yemagetsi yakanyorwa, semuenzaniso, pabhatiri, nepo voltage yekusunga iri voltage chaiyo yemagetsi kana musiyano chaiwo wepotenti, uko kukosha kunokonzerwa nemagetsi ari kuyerera mubhatiri.
