Kalkuluta ya malamulo a Ohm
Kuchotsa kwa voltaji, m'mawa, kukana kapena mphamvu - kulowa onse awiri a awiri.
Zithunzizi zimasintha monga momwe mumalemba.
Zachidule
Ohm's law is the single most-used relationship in electronics: the voltage across a resistor equals the current through it times its resistance, V = I × R. Rearranged, the current is I = V / R and the resistance is R = V / I. Power — the rate at which the component turns electrical energy into heat or work — adds a second relationship, P = V × I, which combines with Ohm's law to give the two equivalents P = I² × R and P = V² / R. Together these four quantities form the V–I–R–P 'Ohm's law wheel', and knowing any two of them fixes the other two.
This calculator lets you pick which quantity to solve for and enter any two of the others, then returns the full wheel plus the three equivalent power formulas side by side. For example, a 12 V supply driving a 6 Ω resistor gives I = 12 / 6 = 2 A and P = 12 × 2 = 24 W; check it with P = I² × R = 4 × 6 = 24 W and P = V² / R = 144 / 6 = 24 W, all agreeing. Because the tool back-fills every missing value, entering power and current instead is just as valid — 24 W at 2 A returns 12 V and 6 Ω.
Ohm's law holds exactly for any DC resistive circuit and for the resistive part of an AC circuit, which makes it the everyday tool for sizing current-limiting resistors, choosing LED droppers, working out fuse and wire ratings, reading how much a heater or motor will draw, and predicting the heat a resistor must dissipate. It does not by itself describe capacitors, inductors or non-ohmic parts like diodes, where the voltage–current relationship is no longer a straight line.
Mafunso ofunsidwa nthawi zambiri
Kodi ndi chiyani malamulo a Ohm?
Ohm’s law states that the current through a conductor is proportional to the voltage across it: V = I × R. Rearranged, I = V / R and R = V / I.
Kodi ndingapeze bwanji mphamvu yamagetsi kuchokera ku malamulo a Ohm?
Power ndi voltage nthawi zina m'mawa, P = V × I. Kugwiritsa ntchito malamulo Ohm mukhozanso kulemba izo monga P = I² × R kapena P = V² / R — onse atatu amapereka Watts chimodzimodzi.
Kodi malingana ndi maganizo anga angati?
Sankhani kuchuluka komwe mukufunikira mu "Solute for", kenako dinani pa awiri a atatu ena. Kuti mupeze kukana, mutha kupatsa voltage ndi m'mawa, kapena mphamvu ndi m'mawa.
Kodi ndingagwiritse ntchito mphamvu pamalo a voltage kapena m'mawa monga kulowa?
Yaikulu mphamvu nyanja amalola inu kuchotsa kuchokera mphamvu ndi imodzi zina zambiri - kwachitsanzo, 24 W kunyamula pa 2 A amabwerera 12 V ndi 6 Ω, pogwiritsa ntchito V = P / I ndi R = P / I².
Kodi malamulo Ohm ntchito kwa AC ma circuits?
Kuphatikiza apo, ndi mfundo yoti mphamvu yamagetsi imachokera ku mphamvu yamagetsi, ndipo mphamvu yamagetsi imachokera ku mphamvu yamagetsi, ndipo mphamvu yamagetsi imachokera ku mphamvu yamagetsi, ndipo mphamvu yamagetsi imachokera ku mphamvu yamagetsi, ndipo mphamvu yamagetsi imachokera ku mphamvu yamagetsi, ndipo mphamvu yamagetsi imachokera ku mphamvu yamagetsi, ndipo mphamvu yamagetsi imachokera ku mphamvu yamagetsi.
N'chifukwa chiyani wanga resistor amatenga kutentha - mphamvu zingati si izo dissipate?
A resistor amasintha mphamvu yamagetsi ku kutentha pa P = I² × R watts. A 6 Ω resistor kunyamula 2 A amawononga 4 × 6 = 24 W, kotero kuti amafuna mphamvu rating bwino pamwamba pa izo. Undersizing the wattage ndi chifukwa cha nthawi zonse chochotsedwa kapena cholephera resistors.
Kodi izi zimagwira ntchito zosagwirizana ndi zida monga diode kapena LED?
Ohm's malamulo amaganiza kuti ndi wolimba kwambiri, kotero kuti si model diodes, LEDs kapena transistors amene m'mawa akukwera non-linearly ndi voltage. For a LED inu m'malo mwake kukula mfulu resistor kuchokera kupatsa voltage minus the LED kumbuyo voltage.
API — kugwiritsa ntchito izi calculator kuchokera code
Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Kuti mudziwe zambiri, pitani ku www.json.org/json.html. Chomweko chilichonse chimene mumasiya chimagwiritsa ntchito mfundo yoyamba yomweyi yomwe tsambali limagwiritsa ntchito; mfundo yosadziwika ndi 400, siyiyenera kukhala zero yosadziwika. Onani zonse API docs →
Chithunzi
GET https://calculator.free/api/v1/ohms-law/curl
curl "https://calculator.free/api/v1/ohms-law/?solve=r&voltage=12¤t=2&resistance=6"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/ohms-law/?" + new URLSearchParams({
"solve": "r",
"voltage": "12",
"current": "2",
"resistance": "6"
}));
const data = await r.json();
console.log(data.results);Zimenezi ndi zowerengera zokhudzana ndi malangizo amtundu uliwonse, si zokhudzana ndi ndalama, zamoyo kapena zokhudzana ndi ndalama.