Enter the source voltage (volts), the resistance 1 (ohms), and the resistance 3 (ohms) into the calculator to determine the Thevenin Voltage.
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Thevenin Voltage Formula
The following formula is used to calculate the Thevenin Voltage.
Va-b = Vs * R3 / (R1+R3)
- Where Va-b is the Thevenin Voltage (volts)
- Vs is the source voltage (volts)
- R1 is the resistance 1 (ohms)
- R3 is the resistance 3 (ohms)
To calculate thevenin voltage, multiply the source voltage by resistance 3, then divide by the sum of resistances 1 and 3.
How to Calculate Thevenin Voltage?
The following example problems outline how to calculate the Thevenin Voltage.
Example Problem #1
- First, determine the source voltage (volts). In this example, the source voltage (volts) is determined to be 10 .
- Next, determine the resistance 1 (ohms). For this problem, the resistance 1 (ohms) is measured to be 3 .
- Next, determine the resistance 3 (ohms). In this case, the resistance 3 (ohms) is found to be 4.
- Finally, calculate the Thevenin Voltage using the formula above:
Va-b = Vs * R3 / (R1+R3)
Inserting the values from above into the equation gives:
Va-b = 10 * 4 / (3+4) = 5.71 (volts)
Example Problem #2
Using the same method as above, determine the variables required by the equation. For this example problem, these are provided as follows:
source voltage (volts) = 50
resistance 1 (ohms) = 5
resistance 3 (ohms) = 6
Entering these given values into the calculator above yields:
Va-b = 50 * 6 / (5+6) = 27.27 (volts)
