Electric resistance can be determined by using the relationship between electrical power and electrical potential. The formula for this relationship is: electric power = (electrical potential)^2 / electrical resistance. By rearranging this formula, we can solve for electrical resistance as: electrical resistance = (electrical potential)^2 / electric power. This means that if we know the electrical power and electrical potential of a circuit, we can calculate the electrical resistance. This is a useful calculation in designing and analyzing electrical circuits.

An alternative formula for determining the resistance can be derived from:

\(P\) \(=\) \(\dfrac{V^2}{R}\)

\(R\): the resistance

\(V\): the electric potential

\(P\): the electric power

The SI unit of electric resistance is: \(ohm\text{ }(\Omega)\)

## Find R

Use this calculator to determine the resistance when the electric potential and the electric power are given.

the electric potential

\(V\)

\(volt\)

the electric power

\(P\)

\(watt\)

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