Enter the circuit voltage (volts) and the equivalent resistance (ohms) into the calculator to determine the Power From Resistance.
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Power From Resistance Formula
The following formula is used to calculate the Power From Resistance.
P = V^2/ Re
- Where P is the Power From Resistance (watts)
- V is the circuit voltage (volts)
- Re is the equivalent resistance (ohms)
How to Calculate Power From Resistance?
The following two example problems outline how to calculate the Power From Resistance.
Example Problem #1:
- First, determine the circuit voltage (volts). In this example, the circuit voltage (volts) is measured to be 12.
- Next, determine the equivalent resistance (ohms). For this problem, the equivalent resistance (ohms) is calculated to be 5.
- Finally, calculate the Power From Resistance using the formula above:
P = V^2/ Re
Inserting the values from above and solving the equation with the imputed values gives:
P = 12^2/ 5 = 28.8 (watts)
Example Problem #2:
Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:
circuit voltage (volts) = 4
equivalent resistance (ohms) = 2
Entering these values into the formula or calculator above gives us::
P = 16^2/ 2 = 8 (watts)
