Om qonuniga ko'ra, ikki nuqta orasidagi o'tkazgichdan o'tadigan tok shu nuqtalar orasidagi kuchlanishga to'g'ri mutanosib va qarshilikka teskari mutanosibdir. Formula: V = I × R, bu yerda V — voltdagi kuchlanish, I — amperlik tok kuchi, R — omdagi qarshilik.

Kuchlanish, tok, qarshilik va quvvat o'rtasidagi bog'liqlik qanday?

The four fundamental relationships are: V = I × R (Ohm's Law), P = V × I (power), P = I² × R (power from current and resistance), and P = V² / R (power from voltage and resistance). Knowing any two values allows you to calculate the other two.

Ketma-ket va parallel qarshiliklar qanday farqlanadi?

In series, resistances add directly: R_total = R1 + R2 + R3. In parallel, reciprocals add: 1/R_total = 1/R1 + 1/R2 + 1/R3. Series increases total resistance, while parallel decreases it. For two parallel resistors: R_total = (R1 × R2) / (R1 + R2).

Elektr o'tkazuvchanlik nima?

O'tkazuvchanlik (G) — bu qarshilikning teskari miqdori: G = 1/R. U simenslarda (S) o'lchanadi. Yuqori o'tkazuvchanlik materialning elektr tokini osonroq o'tkazishini anglatadi. Bu parallel zanjirlarda foydali bo'lib, ularda o'tkazuvchanliklar bevosita qo'shiladi.

Om qonuni o'zgaruvchan tok (AC) zanjirlariga tatbiq etiladi?

Ohm's Law applies to AC circuits when using impedance (Z) instead of resistance (R). In AC, V = I × Z, where Z includes resistance, inductive reactance (XL = 2πfL), and capacitive reactance (XC = 1/2πfC). For purely resistive AC loads, V = IR still applies directly.

Muhandislik uchun bepul vosita

Omning’ qonuni kalkulyatori

Kuchlanish, tok, qarshilik yoki quvvatdan ixtiyoriy ikkita ma’lum elektr parametrini kiriting — to’rtta qiymatni, shuningdek o’tkazuvchanlik va soatlik energiyani bir zumda hisoblang.

V = I × R P = V × I Ohm’s Wheel

Results

Voltage

—

Current

—

Resistance

—

Power

—

O’tkazuvchanlik (G = 1/R)

—

Soatlik energiya

—

Ohm’s Law

Omning’ qonuni elektr zanjirida kuchlanish, tok va qarshilik o’rtasidagi asosiy munosabatni belgilaydi:

Quvvat bog’liqliklari

Elektr quvvatini ikkita ma’lum qiymatning istalgan kombinatsiyasidan hisoblash mumkin:

Omning’ qonuni g’ildiragi

All twelve formulas derived from V = IR and P = VI:

Find	From V & I	From V & R	From I & R	From P
V	—	—	V = I × R	V = P / I or √(P × R)
I	—	I = V / R	—	I = P / V yoki √(P / R)
R	R = V / I	—	—	R = V² / P or P / I²
P	P = V × I	P = V² / R	P = I² × R	—

Amaliy Misol

Misol — LED uchun Rezistor Hisoblash

Given: Supply = 12 V, LED forward voltage = 2 V, desired current = 20 mA

Rezistordagi kuchlanish: 12 − 2 = 10 V

R = V / I = 10 / 0.020 = 500 Ω

P = V × I = 10 × 0.020 = 0.2 W (kamida ¼W rezistor ishlating)

Tip: O'tkazuvchanlik (G) — qarshilikning teskari qiymati: G = 1/R, siemens (S) birligida o'lchanadi. Parallel zanjirlarda o'tkazuvchanliklar to'g'ridan-to'g'ri qo'shilgani uchun tahlilda qulay: G_total = G₁ + G₂ + G₃.