Tus qauv hais lus
Muaj ntau hom kev hais lus, tab sis lawv cov qauv kev ua haujlwm yooj yim zoo ib yam. Lawv yog txhua qhov kev hloov uas hloov cov hluav taws xob ua hluav taws xob ua suab ua cim kom rov ua haujlwm. Tam sim no qhov feem ntau siv tau yog lub tshuab hais lus electrodynamic, uas yog cov ua ke ntawm daim duab daig caj dab, lub suab coil, cov hlau nplaum tas mus li, lub cim thiab lwm yam.
