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Ohm's Law aur Circuits: formulas aur numericals

Likhne wali: Javeria Maqsood, Rehnuma · Aakhri update: 2 November 2026

Ohm ka law current, voltage aur resistance ke rishte ko batata hai aur electricity ke zyadatar numericals isi par chalte hain.

Ohm's Law

V = I × R, yani I = V ÷ R aur R = V ÷ I.

Ye law un conductors par lagta hai jin ka temperature nahi badalta (ohmic conductors).

Hal kiya hua numerical

Sawal: 12 V ki battery 4 Ω ke resistor se judi hai. Current kitni hogi?

Hal: I = V ÷ R = 12 ÷ 4 = 3 A.

Series circuit

Resistors ek ke baad ek lage hon to R = R₁ + R₂ + R₃. Current har jagah barabar rehti hai.

Misal: 2 Ω aur 3 Ω series mein = 5 Ω.

Parallel circuit

Resistors alag alag raston par lage hon to 1/R = 1/R₁ + 1/R₂. Voltage har branch par barabar hota hai.

Misal: 6 Ω aur 3 Ω parallel: 1/R = 1/6 + 1/3 = 1/6 + 2/6 = 3/6 = 1/2, yani R = 2 Ω.

Electric power

P = V × I (watt). Ohm ke law se P = I²R aur P = V²/R bhi milta hai.

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Is topic mein mazeed madad ke liye Physics ka page dekhein.

Aksar poochhe jane wale sawal

Ohm ka law kya hai?

V = I × R: voltage, current aur resistance ka rishta.

Parallel mein total resistance kam kyun hota hai?

Kyunke current ko guzarne ke zyada raaste mil jate hain.

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