Resistance

Resistance \((R)\) is the ability to resist or prevent the flow of current. In order to overcome the resistance and get the current to flow a higher voltage will be required. Resistance is measured in Ohms, represented by \(R\) and has a symbols \(\Omega\).            

Ohm is a unit of resistance. A constant current of one ampere produces a force of one volt.

 

resistance formula
\(\large{  R = \frac{V}{I} }\)
Symbol	English	Metric
\(\large{ R }\) = resistance	\(\large{\Omega}\)	\(\large{\frac{kg-m^2}{s^3-A^2}}\)
\(\large{ I }\) = current	\(\large{I}\)	\(\large{\frac{C}{s}}\)
\(\large{ V }\) = voltage	\(\large{V}\)	\(\large{\frac{kg-m^2}{s^3-A}}\)

 

resistance formula
\(\large{  R = \frac{V^2}{P} }\)
Symbol	English	Metric
\(\large{ R }\) = resistance	\(\large{\Omega}\)	\(\large{\frac{kg-m^2}{s^3-A^2}}\)
\(\large{ P }\) = power	\(\large{P}\)	\(\large{\frac{kg-m^2}{s^3}}\)
\(\large{ V }\) = voltage	\(\large{V}\)	\(\large{\frac{kg-m^2}{s^3-A}}\)

 

resistance formula
\(\large{  R = \frac{P}{I^2} }\)
Symbol	English	Metric
\(\large{ R }\) = resistance	\(\large{\Omega}\)	\(\large{\frac{kg-m^2}{s^3-A^2}}\)
\(\large{ I }\) = current	\(\large{I}\)	\(\large{\frac{C}{s}}\)
\(\large{ P }\) = power	\(\large{P}\)	\(\large{\frac{kg-m^2}{s^3}}\)