Lamulo la Ohm: chilichonse chomwe muyenera kudziwa

Lamulo la Ohm, babu yoyatsa

Ngati mukuyambira pamagetsi zamagetsi zamagetsi ndi zamagetsi, ndithudi mwamvapo zotchuka kangapo Lamulo la Ohm. Osatinso zochepa, popeza ndi lamulo lofunikira mderali. Sizovuta konse, ndipo zimaphunziridwa koyambirira chifukwa chofunikira kwambiri, ngakhale zili choncho, pali oyamba kumene omwe sakudziwa.

Mu bukhuli mutha phunzirani zonse zomwe mukufuna za Lamulo la Ohm, kuchokera pa zomwe zili, kupita kuzinthu zosiyanasiyana zomwe muyenera kuphunzira, momwe zingagwiritsidwe ntchito Ntchito zothandiza, etc. Ndipo kuti zinthu zikhale zosavuta ndizipanga kufananiza kwachilengedwe pakati pamagetsi ndi madzi kapena ma hydraulic system ...

Kuyerekeza ndi makina oyendera madzi

kuyerekeza ndi madzi vs magetsi

Ndisanayambe ndikufuna kuti mudziwe bwino momwe magetsi amagwirira ntchito. Zitha kuwoneka zovuta komanso zosamveka bwino kuposa machitidwe ena, ngati ma hydraulic pomwe mumakhala madzi omwe amadutsa m'machubu zosiyanasiyana. Koma bwanji mukadachita a masewera olimbitsa thupi ndikuganiza kuti ma electron amagetsi ndi madzi? Mwina zingakuthandizeni kumvetsetsa mwachangu komanso mwachidule momwe zinthu zimagwirira ntchito.

Pachifukwa ichi ndipanga kufananiza pakati pa imodzi yamagetsi ndi imodzi yama hydraulic system. Mukayamba kuziwona motere zidzakhala zomveka bwino:

  • kondakitala: ingoganizirani kuti ndi chubu chamadzi kapena payipi.
  • Kuteteza: Mutha kuganiza za chinthu chomwe chimaletsa kuyenda kwa madzi.
  • Magetsi: sichinthu china koma kuyenderera kwamagetsi kumadutsa kondakitala, chifukwa chake mungaganize ngati madzi akuyenda kudzera mu chubu.
  • Voltage: kuti magetsi azitha kuyenda modutsa pamayenera kukhala kusiyana pakati pa mfundo ziwiri, zili ngati mukufuna kusiyana pakati pamiyeso iwiri yomwe mukufuna madzi aziyenda. Ndiye kuti, mutha kulingalira zamagetsi ngati kuthamanga kwa madzi mu chubu.
  • Kutsutsana: Monga momwe dzinalo likusonyezera, ndikutsutsana ndi kudutsa kwa magetsi, ndiye kuti, china chake chomwe chimatsutsana nacho. Ingoganizirani kuti mwaika chala kumapeto kwa payipi wothirira m'munda mwanu ... zomwe zimapangitsa kuti zikhale zovuta kuti ndegeyo ituluke ndikuwonjezera mphamvu yamagetsi (magetsi).
  • Mphamvu: mphamvu kapena mphamvu yomwe imadutsa pamagetsi yamagetsi imatha kukhala yofanana ndi kuchuluka kwa madzi omwe amayenda kudzera mu chubu. Mwachitsanzo, taganizirani kuti chubu limodzi ndi 1 ″ (kutsika mwamphamvu) ndipo chubu ina ndi 2 ″ (mwamphamvu kwambiri) yadzazidwa ndi madzi awa.

Izi zitha kukupangitsaninso kuganiza kuti mutha kufananiza zigawo zamagetsi ndi hayidiroliki:

  • Selo, batri, kapena magetsi: itha kukhala ngati kasupe wamadzi.
  • Condenser: Titha kumvetsetsa ngati dziwe lamadzi.
  • Transistor, kulandirana, lophimba ...- Zipangizo zowongolera izi zimatha kumveka ngati matepi omwe mutha kuyatsa ndi kutseka.
  • Kutsutsana- Zitha kukhala zotsutsana zomwe mumayika mukakanikiza chala chanu kumapeto kwa payipi yamadzi, owongolera m'minda / ma nozzles, ndi zina zambiri.

Zachidziwikire, mutha kuganiziranso pazomwe zanenedwa mgawoli kuti mupeze mfundo zina. Mwachitsanzo:

  • Mukawonjezera gawo la chitoliro (mwamphamvu) kukana kudzachepa (onani Lamulo la Ohm -> I = V / R).
  • Mukakulitsa kukana kwa chitoliro (kukana), madzi amatuluka ndi kuthamanga kwambiri pamlingo wofanana (onani Lamulo la Ohm -> V = IR).
  • Ndipo ngati muwonjezera kutuluka kwamadzi (mwamphamvu) kapena kuthamanga (magetsi) ndikulozetsa ndegeyo kwa inu, zitha kuwononga kwambiri (kugunda kwamagetsi kowopsa).

Ndikukhulupirira kuti ndi mafanizowa mwamvetsetsa china chake ...

Lamulo la Ohm ndi liti?

Zolemba Zamalamulo a Ohm

La Lamulo la Ohm Ndi ubale wofunikira pakati pamiyeso itatu yayikulu yomwe ili mphamvu yazomwe zilipo, mavuto kapena mphamvu yamagetsi, komanso kukana. China chake chofunikira kumvetsetsa momwe magwiridwe antchito amagwirira ntchito.

Amadziwika ndi dzina loti adamupeza, wasayansi waku Germany George Om. Anatha kuzindikira kuti nthawi zonse, magetsi amayenda molumikizana molumikizana molingana ndi mphamvu yamagetsi yomwe imagwiritsidwa ntchito mopingasa komanso molingana ndi kukana. Ndiye kuti, I = V / R.

Makulidwe atatu aja a chilinganizo Zitha kuthetsedwa kuti ziwerengere voliyumuyo pokhudzana ndi kuchuluka kwake komanso kukana kwake, kapena kukana ngati ntchito yamagetsi omwe apatsidwa ndi mphamvu. Mwanjira:

  • Ine = V / R
  • V = IR
  • R = V / Ine

Pokhala ine ndimphamvu pakali pano pa dera lofotokozedwa mu amperes, V voteji kapena magetsi ofotokozedwa mu volts, ndi R kukana komwe kumafotokozedwa mu ohms.

Por ejemploIngoganizirani kuti muli ndi nyali yomwe imagwiritsa ntchito 3A ndipo imagwira ntchito pa 20v. Kuti muwerenge kukana komwe mungagwiritse ntchito:

  • R = V / Ine
  • R = 20/3
  • R6.6 Ω

Zosavuta, sichoncho?

Mapulogalamu a Law a Ohm

ndi Ntchito za Ahm's Law Alibe malire, amatha kuwagwiritsa ntchito pamawerengero owerengera komanso kuwerengera kuti apeze zina zazikulu zomwe zimakhudzana ndi madera. Ngakhale madera ali ovuta kwambiri, amatha kukhala osavuta kugwiritsa ntchito lamuloli ...

Muyenera kudziwa kuti zilipo mikhalidwe iwiri yapadera mkati mwa Lamulo la Ohm mukamayankhula za dera, ndipo awa ndi awa:

  • Short dera: pamenepa ndipamene mayendedwe awiri kapena zigawo za dera zimalumikizana, monga pomwe pali chinthu chomwe chimalumikizana pakati pa ma conductor awiri. Izi zimapangitsa kuti pakhale zovuta kwambiri pomwe pano zikufanana ndi magetsi ndipo zimatha kuwononga kapena kuwononga zigawozo.
  • Tsegulani dera: ndi pomwe dera limasokonezedwa, mwina pogwiritsa ntchito switch, kapena chifukwa choti wochititsa wina wadulidwa. Poterepa, ngati dera lidayang'aniridwa malinga ndi Lamulo la Ohm, zitha kutsimikiziridwa kuti pali kulimbana kopanda malire, chifukwa chake sikutha kuyendetsa pano. Poterepa, sizowononga magawo azigawo, koma sizigwira ntchito nthawi yayitali.

Potencia

mphamvu

Ngakhale Lamulo lalikulu la Ohm siliphatikiza kukula kwa mphamvu yamagetsi, itha kugwiritsidwa ntchito ngati maziko owerengera pama circuits amagetsi. Ndipo ndikuti mphamvu yamagetsi imadalira mphamvu yamagetsi ndi mphamvu (P = I · V), china chake chomwe Lamulo la Ohm lingathandizire kuwerengera ...


Zomwe zili m'nkhaniyi zikutsatira mfundo zathu za malamulo okonzekera. Kuti mufotokoze cholakwika dinani Apa.

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