Ohm’s Law Flowchart
The process of solving problems involving electrical quantities using Ohm’s (or Watt’s) Law is always the same:
1.
2.
3.
4.
Identify the quantity to be found (the unknown).
Look at the known quantities.
Choose the equation that relates the knowns to the unknown.
Solve for the unknown.
Flowcharts are a means of graphically showing the steps in a process. The following flowchart provides a visual
representation of steps 1-4 in the above Ohm’s Law problem solving process.
QUANTITY TO BE FOUND
I (Current)
P
&
R
𝑰=
R
&
V
P
&
V
𝑰=
𝑷
𝑹
P (Power)
𝑷
𝑽
I
&
R
R (Resistance)
R
&
V
I
&
V
I
&
P
𝑹=
𝑷 = 𝑰𝑽
𝑰=
𝑽
𝑹
𝑷 = 𝑰𝟐 𝑹
𝑽𝟐
𝑷=
𝑹
𝑹=
P
&
V
I
&
V
𝑷
𝑰𝟐
V (Voltage)
I
&
P
I
&
R
𝑽
𝑰
𝑹=
P
&
R
𝑽 = 𝑰𝑹
𝑽𝟐
𝑷
𝑽=
𝑷
𝑰
𝑽=
EQUATIONS TO USE TO FIND QUANTITY
𝑷𝑹