Umthetho ka-Ohm - izinkinga nezixazululo

Ngokusekelwe kuthebula elingezansi, ubudlelwano phakathi kwe-voltage (V), i-electric current (I) kanye nokumelana (R) bu…..

Umthetho ka-Ohm - izinkinga nezixazululo 1 Isixazululo:

Umthetho ka-Ohm:

V = IR noma R = V / I

R ₁ = V / I = 1.50 / 0.08 = 18.75 Ohms

R ₂ = V / I = 2.80 / 1.50 = 2.87 Ohms

R ₃ = V / I = 3.99 / 2.10 = 1.9 Ohms

Ngokusekelwe kuthebula, ubudlelwano phakathi kuka-V, u-I no-R buyinani lika-R elihambisana ngokuphambene no-V no-I. Lokho kusho ukuthi uma u-V no-I bebakhulu, u-R uba mncane.

Inani le-V/I aliguquguquki ngakho alibonisi umthetho we-Ohm . Ngokomthetho we-Ohm, inani le-V/I kumele liguquguquke.

2. Yiliphi igrafu elibonisa ubudlelwano phakathi komehluko ongaba khona nogesi kagesi?

Umthetho ka-Ohm - izinkinga nezixazululo 2

Isixazululo:

3. Ngokusekelwe kudatha ethebula elilandelayo lemiphumela yokuhlola, kungaphethwa ngokuthi ugesi wamanje ...

Umthetho ka-Ohm - izinkinga nezixazululo 3 Isixazululo:

Ngokusekelwe kudatha esetafuleni, uma i-voltage kagesi inkulu, i-electron current iba nkulu. Ngakho-ke kuphethwa ngokuthi i-electron current ilingana ne-voltage.

4. Idivayisi inokumelana okungu-150 Ohm kanye nogesi we-2A odlulayo. Umehluko ongaba khona …

Kwaziwa:

Ukumelana (R) = 150 Ohm

Ugesi wamanje (I) = 2 Ampere

Okufunwayo: I-Voltage (V)

Isixazululo:

V = IR

V = i-voltage kagesi, I = ugesi wamanje, R = ukumelana kagesi

Voltage:

V = IR = (2 Ampere)(150 Ohm) = 300 Volts

5. Ugesi ocingweni lwe-resistor ungu-4 A. Uma zombili iziphetho zinikezwa amandla angu-12 Volts. Kuyini ukumelana kukagesi?

Kwaziwa:

Amandla kagesi (I) = 4 Ampere

I-Voltage (V) = 12 Volt

Okufunwayo: Ukumelana kukagesi (R)

Isixazululo:

Ukumelana :

R = V / I = 12 Volts / 4 Amps = 3 Ohms

Uyini umthetho ka-Ohm?
- ImpenduloUmthetho ka-Ohm uthi ugesi ( $I$ ) okugeleza ngomqhubi phakathi kwamaphuzu amabili kuhambelana ngqo ne-voltage ( $V$ ) kuzo zombili izindawo, futhi ngokulingana okuphambene nokumelana ( $R$ ) yomqhubi. Ngokwezibalo, imelelwa njenge $V = I R$ .
Uma i-resistor ilandela uMthetho ka-Ohm, hlobo luni lobudlelwano okufanele silubone phakathi kwe-voltage kanye ne-current?
- Impendulo: Kufanele siqaphele ubudlelwano obuqondile. Uma udweba i-voltage ngokumelene nogesi, ukuthambekela komugqa kuzomelela ukumelana, futhi umugqa uzodlula endaweni yokuqala.
Ukwandisa ukumelana kwesekethe kuyithinta kanjani i-current, uma sicabanga ukuthi i-voltage ihlala ingaguquki?
- Impendulo: Uma ukumelana kukhuphuka ngenkathi i-voltage ihlala ingaguquki, ugesi osesekethe uzoncipha, ngokusho koMthetho ka-Ohm.
Kungani uMthetho ka-Ohm ungase ungasebenzi ngaphansi kwezimo ezithile noma ezintweni ezithile?
- Impendulo: Umthetho we-Ohm usebenza ezintweni "ze-ohmic" lapho ukumelana kuhlala kungaguquki khona lapho i-voltage ishintsha. Kodwa-ke, kwezinye izinto namadivayisi (njengama-diode, noma kuma-frequency aphezulu kakhulu noma amazinga okushisa), ukumelana kungashintsha nge-voltage noma i-current, okwenza ubudlelwano bungabi yi-linear.
Iyini iyunithi yokumelana, futhi ichazwa kanjani ngokoMthetho ka-Ohm?
- Impendulo: Iyunithi yokumelana yi-ohm (Ω). I-ohm eyodwa ichazwa njengokumelana okuzovumela i-ampere eyodwa yamandla kagesi ukuthi igeleze lapho kusetshenziswa i-volt eyodwa kuyo.
Uma ama-resistor amabili ochungechungeni womabili elalela ngokuqinile uMthetho ka-Ohm, ingabe inhlanganisela izolalela noMthetho ka-Ohm?
- Impendulo: Yebo, inhlanganisela izolalela noMthetho ka-Ohm. Ukumelana okuphelele ochungechungeni kuyisamba sokumelana ngakunye, kanti ugesi kuzo zombili uzoba okufanayo. I-voltage kuyo yonke inhlanganisela izoba yisamba sama-voltage kuyo yonke i-resistor.
Ukumelana kwentambo kuncike kanjani kubude bayo kanye nendawo yayo enqamulayo?
- Impendulo: Ukumelana kwentambo kuhambelana ngqo nobude bayo futhi kuhambelana ngokuphambene nendawo yayo enqamulayo. Ngakho-ke, intambo ende izoba nokumelana okukhulu, kanti intambo ebanzi izoba nokumelana okuncane.
Uma i-voltage enqamula i-resistor iphindwe kabili, ishintsha kanjani i-current, uma sicabanga ukuthi i-resistor ihlala i-ohmic?
- Impendulo: Uma i-resistor ihlala i-ohmic (futhi ngaleyo ndlela ilandela uMthetho ka-Ohm), ukuphinda kabili i-voltage nakho kuzophinda kabili i-current.
Ingabe ingxenye engenawo nhlobo ukumelana ingatholakala ngokoqobo?
- ImpenduloEzimweni zansuku zonke ezisebenzayo, ingxenye engakwazi ukumelana nogesi, noma "i-superconductor", ayinakwenzeka kalula. Kodwa-ke, izinto ezithile emazingeni okushisa aphansi kakhulu zingaba ama-superconductor futhi zinikeze ukumelana nogesi nogesi.
Kuyini ukusatshalaliswa kwamandla kwe-resistor ngokoMthetho ka-Ohm?

Impendulo: Amandla ( $P$ ) okuhlakazwe yi-resistor kunikezwa yi- $P = I^{2} R$ or $P = V^{2} / R$ , etholakala ekuhlanganisweni koMthetho ka-Ohm kanye nefomula yamandla $P = I V$ .