قانون أوم ohm's law

قانون أوم ohm's law

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قانون أوم

السلام عليكم ورحمت لله
اليوم سنقدم لكم شرح قانون أوم
1

يعد قانون أوم من أهم القوانين في فرع الفيزياء الكهربائية ، حيث أثبت العالم الألماني جورج سيمون أوم ( 1787- 1854 م ) بعد سلسلة من التجارب في عام 1826م أن التيار الكهربي ( ت ) المار في موصل يتناسب طرديا ( علاقة خطية ) مع فرق الجهد الكهربائي (جـ ) المطبق بين طرفيه، ويمكن تمثيلها بيانيا كما بالشكل

2
ويمكن كتابة العلاقة البيانية بالقانون

قانون أوم Ω يصف العلاقة بين كلا من ( V ) الجهد الذي يعبر عن قوة تدفق الشحنات الكهربائية .. وبين ( R ) المقاومة التي تقاوم هذا التدفق .. وبين النتيجة الحقيقية لهذا التدفق وهي التيار (I )

العلاقة سهلة وبسيطة جدا .. كلما زاد الجهد أو قلت المقاومة كلما زاد التيار المتدفق .. و زيادة المقاومة تحد من مرور التيار كما هو واضح في قانون اوم

الجهد = التيار *المقاومة
التيار = الجهد / المقاومة
3
ولتبسيط يمكنك أتباع هذه الطريقة :

ً

لجهد الكهربائي او قوة الدفع الكهربئيEMF Electromotive Force - VoltIالتيار الكهربائيCurrentRالمقاومة الكهربائيةResistance

E : الجهد الكهربائي او قوة الدفع الكهربائي EMF Electromotive Force

4
The 12 basic formulas for Ohm's Law can be

Voltage = the Square Root of Power * Resistance
5
Voltage = Power / Current

Voltage = Current * Resistance

Resistance = Voltage / Current

Resistance = Power / Current squared

Resistance = Voltage squared / Power

Current = Voltage / Resistance

Current = the Square Root of Power / Resistance

Current = Power / Voltage

Power = Voltage * Current

Power = the Current squared * Resistance

Power = the Voltage squared / Resistance

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