Ohmmeter, ntsuas ntsuas hluav taws xob tiv thaiv, uas tau qhia hauv ohms. Nyob rau hauv qhov yooj yim ohmmeters, qhov kev tiv thaiv yuav tsum tau ntsuas yuav txuas nrog lub ntsuas nyob rau hauv parallel los yog nyob rau hauv series. Yog hais tias nyob rau hauv parallel (parallel ohmmeter), lub ntsuas yuav kos ntau tam sim no raws li kev tiv thaiv nce.
Ohmmeter ntsuas qhov ua haujlwm li cas?
Lub hauv paus ntsiab lus ua haujlwm ntawm Ohmmeter yog, thaum tam sim no ntws los ntawm Circuit Court lossis tivthaiv, tus pointer deflects hauv lub ntsuasThaum tus taw qhia txav mus rau sab laug ntawm lub ntsuas, nws sawv cev. ib tug siab tsis kam thiab teb rau cov tam sim no tsawg. Qhov ntsuas ntsuas qhov ntsuas tsis yog nyob hauv ib qho ohmmeter thiab analog multimeter.
Koj ntsuas impedance nrog multimeter li cas?
Xaiv Z=V / I txhawm rau nrhiav qhov impedance ntawm resonance zaus. Qhov no yuav tsum yog qhov siab tshaj plaws impedance koj tus hais lus yuav ntsib nyob rau hauv lub hom phiaj suab. Piv txwv li, yog tias kuv=1/123 amps thiab voltmeter ntsuas 0.05V (los yog 50mV), ces Z=(0.05) / (1/123)=6.15 ohms.
Dab tsi yog qhov tiv thaiv thiab ntsuas li cas?
Kev tawm tsam yog qhov kev ntsuas ntawm qhov kev tawm tsam rau tam sim no ntws hauv hluav taws xobKev tawm tsam yog ntsuas hauv ohms, cim los ntawm Greek tsab ntawv omega (Ω). Ohms muaj npe tom qab Georg Simon Ohm (1784-1854), German physicist uas kawm txog kev sib raug zoo ntawm voltage, tam sim no thiab tsis kam.
tus qauv tam sim no yog dab tsi?
Tus qauv tam sim no yog muab raws li I=V/R. SI unit ntawm tam sim no yog Ampere (Amp).
