Qhov Tseem Ceeb Qhov txawv - Ohm Txoj Cai vs Kirchhoff Txoj Cai
Thaum nws los nkag siab txog hluav taws xob, nws yog ib qho tseem ceeb heev kom nkag siab txog kev sib raug zoo ntawm cov khoom qub, qhov hluav taws xob thiab tam sim no. Lub hauv paus ntsiab lus uas piav txog qhov kev sib raug zoo no yog Ohm Txoj Cai. Kirchhoff Txoj Cai, ntawm qhov tod tes, yog ib txoj kev xav uas piav txog cov khoom ntawm cov kev txwv no ib tus zuj zus. Yog li, qhov sib txawv tseem ceeb ntawm Ohm txoj cai thiab Kirchhoff txoj cai lij choj yog tias Ohm Txoj Cai piav qhia txog kev sib raug zoo ntawm qhov hluav taws xob thiab tam sim no hla ib qho kev tiv thaiv thaum Kirchhoff txoj cai piav txog tus cwj pwm tam sim no thiab qhov hluav taws xob hauv Circuit Court.
Ohm txoj cai yog dab tsi?
Ohm Txoj Cai hais tias tam sim no ntws los ntawm tus neeg xyuas pib yog qhov sib npaug rau qhov hluav taws xob hla nws thiab rov ua dua. Lub hauv paus ntsiab lus no tau tsim los ntawm German physicist Georg Ohm thiab muab los ntawm,
V=IR
Daim duab 01: Ohm's Law
Ohm Txoj Cai tuaj yeem muab piv rau cov dej ntws hauv cov kav dej. Qhov muaj peev xwm sib txawv ntawm ob qhov kawg tsav cov dej los ntawm cov yeeb nkab zoo li qhov tam sim no uas tau tsav los ntawm qhov sib txawv ntawm qhov sib txawv ntawm cov khoom tiv thaiv. Tsis tas li ntawd, qhov kev txo qis uas ua rau kom qhov tam sim no sib npaug rau qhov txo qis hauv cheeb tsam ntawm cov yeeb nkab uas txo cov dej ntws.
Hais txog ib qho khoom siv lossis ib lub voj voog ntawm tag nrho, Ohm Txoj Cai yog siv los suav tag nrho cov kev tawm tsam thoob plaws lub caij lossis lub voj voog, nrog rau qhov ntsuas tam sim no thiab qhov hluav taws xob. Nrog rau kev ntsuas kev tiv thaiv, lub zog siv hluav taws xob ntawm lub voj voog tuaj yeem txiav txim siab lossis kwv yees yog tias tus nqi tiv thaiv tau hloov pauv los ntawm ib qho twg xws li kub.
Daim ntawv nyuaj ntawm Ohm Txoj Cai yog siv tau rau AC circuits qhov twg V thiab kuv yog qhov sib txawv. Nyob rau hauv tas li ntawd, R yog hais txog impedance ntawm Circuit Court (Z). Impedance kuj yog ib tug complex tooj nyob rau hauv uas tsuas yog ib feem tiag tiag pab rau active zog dissipation.
Kirchhoff Txoj Cai yog dab tsi?
Kirchhoff txoj cai tau thov los ntawm German physicist Gustav Kirchhoff. Kirchhoff Txoj Cai muaj ob hom: Kirchhoff Txoj Cai Tam Sim No (KCL) thiab Kirchhoff's Voltage Law (KVL). KCL thiab KVL piav qhia txog kev txuag ntawm cov dej ntws tam sim no thiab qhov hluav taws xob, feem.
Kirchhoff's Current Law (KCL)
KCL hais tias tag nrho cov tam sim no uas nkag mus rau ntawm ib qho (qhov chaw sib txuas ntawm ob peb ceg circuits) thiab tag nrho cov tam sim no uas ntws tawm ntawm qhov sib npaug.
Daim duab 02: Kirchhoff Txoj Cai Tam Sim No
Kirchhoff's Voltage Law (KVL)
KLV, ntawm qhov tod tes, hais tias cov lej ntawm qhov hluav taws xob hla lub voj kaw yog xoom.
Qhov no tau qhia nyob rau hauv lwm daim ntawv raws li qhov sib npaug ntawm qhov hluav taws xob ntawm ob qhov ntawm ib lub voj voog yog sib npaug rau txhua ceg Circuit Court ntawm ob lub nodes. Nws tuaj yeem piav qhia raws li hauv daim duab hauv qab no.
Daim duab 03: Kirchhoff's Voltage Law
Nyob,
v1 +v2 + v3 -v 4=0
KVL thiab KVC yog qhov tseem ceeb hauv kev txheeb xyuas Circuit Court. Txawm li cas los xij, Ohm Txoj Cai yuav tsum tau siv ua ke nrog lawv hauv kev daws teeb meem tsis sib xws. Piv txwv li qhov kev ntsuam xyuas hauv Circuit Court, tus lej ntws tau muab.
Xav txog cov nodes A thiab B, KCL tuaj yeem siv tau raws li hauv qab no.
Rau node A; I1 + I2=I3
Rau node B; I1 + I2=I3
Tam sim no KVL raug siv rau lub voj kaw (1)
V1 + I1 R1 + I3 R3=0
Tam sim no KVL raug siv rau lub voj kaw (2)
V2 + I2 R2+ I3 R3=0
Tam sim no KVL raug siv rau lub voj kaw (3)
V1 + I1 R1 - I2 R2 – V2=0
Los ntawm kev daws qhov sib npaug saum toj no txhua qhov tsis paub txog ntawm lub voj voog tuaj yeem pom. Nco ntsoov tias, Ohm Txoj Cai yog siv thaum txiav txim siab qhov voltages hla cov resistors.
Qhov txawv ntawm Ohm Txoj Cai thiab Kirchhoff Txoj Cai Li Cas?
Ohm's Law vs Kirchhoff's Law |
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| Ohm Txoj Cai piav qhia txog kev sib raug zoo ntawm qhov hluav taws xob thiab tam sim no hla ib qho kev tiv thaiv. | Kirchhoff Txoj Cai piav qhia txog tus cwj pwm ntawm tam sim no thiab qhov hluav taws xob raws li hauv ib ceg kab ke. |
| Law | |
| Ohm Txoj Cai hais tias qhov hluav taws xob hla ntawm tus neeg xyuas pib yog proportional rau qhov tam sim no ntws los ntawm nws. | KCL hais tias cov sum ntawm tam sim no ntws mus rau ib lub node yog sib npaug zos rau thaum KVL hais tias cov sum ntawm voltages nyob rau hauv ib lub voj kaw yog xoom. |
| Daim ntawv thov | |
| Ohm Txoj Cai yog siv tau rau ib qho kev tiv thaiv ib leeg lossis cov txheej txheem tiv thaiv tag nrho. | KCL thiab KVL muaj feem xyuam rau cov khoom tiv thaiv hauv ib lub voj voog. |
Summary – Ohm's Law vs Kirchhoff's Law
Ohm's thiab Kirchhoff's Laws yog ob txoj kev xav hauv kev ntsuas hluav taws xob hluav taws xob. Lawv piav qhia txog cov khoom thiab kev sib raug zoo ntawm qhov hluav taws xob thiab tam sim no hauv ib qho khoom siv hluav taws xob thiab ib ceg ntawm hluav taws xob hluav taws xob raws li. Thaum Ohm Txoj Cai muaj feem xyuam rau cov khoom tiv thaiv, Kirchhoff's Laws raug siv rau ntau lub ntsiab lus. Qhov no yog qhov sib txawv tseem ceeb tshaj plaws ntawm Ohm txoj cai thiab Kirchhoff txoj cai. KCL thiab KVL feem ntau yog siv hauv kev txheeb xyuas Circuit Court ua ke nrog Ohm Txoj Cai.
Download PDF Version of Ohm's Law vs Kirchhoff's Law
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li cov ntawv sau tseg. Thov download PDF version ntawm no Qhov txawv Ntawm Ohms Law thiab Kirchhoffs Law.
