Kev coj ua vs kev coj ua
Kev coj ua thiab kev coj ua yog ob qho tseem ceeb hauv physics. Hauv tsab xov xwm no, peb yuav tham txog tsuas yog hluav taws xob conductance thiab hluav taws xob conductivity, uas yog ob lub ntsiab lus tseem ceeb hauv hluav taws xob thiab hluav taws xob engineering. Kab lus no hais txog cov ntsiab lus, qhov sib xws, thiab thaum kawg qhov txawv ntawm qhov hluav taws xob conductance thiab hluav taws xob conductivity.
Kev coj ua
Yuav kom nkag siab txog kev coj ua, ib tus yuav tsum xub nkag siab txog qhov tsis kam ntawm ib qho khoom. Kev tiv thaiv yog ib qho cuab yeej tseem ceeb hauv kev lag luam hluav taws xob thiab hluav taws xob. Qhov kev tawm tsam hauv cov ntsiab lus zoo qhia peb tias nws nyuaj npaum li cas rau qhov hluav taws xob ntws. Hauv kev txiav txim siab ntau, qhov kev tawm tsam ntawm ob lub ntsiab lus tuaj yeem txhais tau tias yog qhov sib txawv ntawm qhov voltage uas yuav tsum tau coj ib chav tsev tam sim no hla ob lub ntsiab lus. Qhov kev tiv thaiv ntawm ib qho khoom yog txhais tau tias yog qhov piv ntawm qhov hluav taws xob thoob plaws qhov khoom mus rau qhov tam sim no ntws los ntawm nws. Qhov kev tiv thaiv nyob rau hauv ib tug conductor nyob ntawm seb tus nqi ntawm cov dawb electrons nyob rau hauv nruab nrab. Qhov tsis kam ntawm ib qho semiconductor feem ntau yog nyob ntawm tus naj npawb ntawm doping atoms siv (impurity concentration). Qhov kev tawm tsam qhov system qhia rau qhov hloov pauv tam sim no txawv ntawm qhov ntawd mus rau qhov tam sim no ncaj qha. Yog li ntawd, lub sij hawm impedance tau qhia, kom AC kuj xam tau yooj yim dua. Ohm txoj cai yog ib txoj cai tseem ceeb tshaj plaws thaum lub ntsiab lus tsis kam tham. Nws hais tias rau qhov muab qhov kub thiab txias, qhov sib piv ntawm qhov hluav taws xob hla ob lub ntsiab lus, mus rau qhov tam sim no dhau los ntawm cov ntsiab lus, yog tas li. Qhov no tsis tu ncua yog hu ua qhov tsis kam ntawm ob lub ntsiab lus. Qhov tsis kam yog ntsuas hauv Ohms. Lub conductance ntawm ib feem yog ib qho kev ntsuas ntawm qhov yooj yim npaum li cas tam sim no tuaj yeem ntws los ntawm cov khoom. Lub conductance yog txhais raws li inverse of resistance. Cov conductance yog ntsuas hauv Siemens (S). Nws yuav tsum tau muab sau tseg tias hluav taws xob conductance yog ib yam khoom ntawm nws tus kheej.
Kev coj ua
Qhov kev tiv thaiv ntawm ib feem nyob ntawm ntau yam. Qhov ntev ntawm tus neeg xyuas pib, thaj tsam ntawm tus neeg xyuas pib, thiab cov khoom ntawm tus neeg xyuas pib yog lub npe rau qee yam. Cov conductivity ntawm cov khoom siv tau txhais tau tias yog qhov conductance ntawm ib lub thaiv uas muaj qhov ntev ntawm cov khoom. Lub conductivity ntawm ib yam khoom yog inverse ntawm lub resistivity. Kev coj ua feem ntau yog txhais los ntawm Greek tsab ntawv σ. SI unit ntawm conductivity yog Siemens ib 'meter'. Nws yuav tsum tau muab sau tseg tias conductivity yog tshwj xeeb yog cov khoom ntawm cov khoom ntawm ib tug muab kub. Cov conductivity kuj tseem hu ua cov conductance tshwj xeeb. Cov conductance ntawm ib feem yog sib npaug rau cov conductivity ntawm cov khoom muab multiplied los ntawm qhov chaw ntawm cov khoom muab faib los ntawm qhov ntev ntawm cov khoom.
Qhov txawv ntawm Kev Coj Ua thiab Kev Coj Ua Dab Tsi?
• Kev coj ua yog yam khoom ntawm cov khoom tab sis kev coj ua yog cov khoom ntawm cov khoom.
• Kev coj ua yog nyob ntawm qhov ntev ntawm tus neeg xyuas pib, tab sis conductivity tsis nyob ntawm qhov ntev.
• Kev coj ua yog ntsuas hauv Siemens thaum conductivity yog ntsuas hauv Siemens ib meter.
