Kev txhais ntawm kev sib nqus induction
Lub zog hluav taws xob hauv lub zog hluav taws xob kom hluav taws xob tau txais nyob rau hauv hluav taws xob hluav taws xob yog tas li, thiab cov kev taw qhia yog tib yam li lossis rov qab mus rau hluav taws xob kev taw qhia ntawm qhov taw tes. Lub zog quab yuam (amperance) ntawm qhov tam sim no hauv qhov chaw sib nqus tau muaj feem xyuam nrog cov kev taw qhia uas qhov tam sim no muab tso rau hauv qhov chaw magnetic. Thaum cov kev taw qhia tam sim no thaum uas tig mus rau txoj kev taw qhia ntawm qhov chaw sib nqus, qhov sib luag ntawm qhov tam sim no tsawg heev, sib npaug nrog xoom; thaum qhov kev taw qhia tam sim no thiab cov lus qhia magnetic teb Thaum ntsug, qhov tam sim no feem ntau cuam tshuam los ntawm ampere.
Tus nqi them nqi q yog raug rau lub zog f thaum lub v hloov mus rau qhov chaw magnetic. Raws li cov xwm txheej muab los ntawm lub sib nqus, qhov ntau ntawm f tau cuam tshuam txog kev coj ntawm lub zog ntawm kev sib tw. Thaum v nyob hauv los yog rov qab rau ib qho kev taw qhia tshwj xeeb, lub zog yog xoom; thaum v ua ntu zus rau qhov kev taw qhia tshwj xeeb no, qhov kev quab yuam yog qhov siab tshaj plaws, uas yog Fm. Fm yog sib npaug rau | q | thiab v. Tus piv yog ywj pheej ntawm cov lus tsa suab, cuam tshuam qhov xwm ntawm lub teb chaw sib nqus nws tus kheej, txhais raws li qhov loj ntawm lub sib nqus induction, piv txwv li. Cov kev taw qhia ntawm B txhais tau tias yog cov kev taw qhia nyob rau sab xis kauv nce qib thaum qhov kev taw qhia ntawm qhov siab tshaj plaws Fm ntawm qhov zoo tau them mus rau cov kev taw qhia ntawm kev ua haujlwm v. lub sib nqus teb B tau qhia raws li F = QVB, uas yog Lorentz quab yuam mis.