Simplified explanation of Ohm's Lawشرح مبسط لقانون اوم

       

      Ohm's Law

Ohm's Law,discovered by a German physicist Simon Ohm (1787-1854),

Is an important law that describes the relationship of voltage E to current I and resistance R.it is often referred to as the foundation of circuit analysis and can be expressed by three different ways:

I=E/R,     E=I R   or  R=E/I

Where         

E= the potential difference from one end of a resistance element to the other ,in volts.

I=the current through the same resistance element,in amperes.

R=the resistance of the same element,in ohms.

 I = E/R

E

I = 3 v / 1000 Ω

 = 0.003 A

= 3 mA

I = 6 v / 1000 Ω

 = 0.006 A

= 6 mA

I =  9 v / 1000 Ω

= 0.009 A

= 9 mA

I = 12 v / 1000 Ω

 = 0.012 A

= 12 mA

I = 15 v / 1000 Ω

 = 0.015 A

= 15 mA

for any circuit the electric current is directly proportional to the voltage and is inversely proportional to the resistance.

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