Enter the voltage across the resistor (volts) and the resistance at each resistor (ohms) into the calculator to determine the Series Current. In a series circuit, the current is constant across every component.
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Series Current Formula
The following formula is used to calculate the Series Current.
Is = Vs / Rs
- Where Is is the Series Current (volts)
- Vs is the voltage across the resistor (volts)
- Rs is the resistance at each resistor (ohms)
How to Calculate Series Current?
The following two example problems outline how to calculate the Series Current.
Example Problem #1:
- First, determine the voltage across the resistor (volts). In this example, the voltage across the resistor (volts) is measured to be 50.
- Next, determine the resistance at each resistor (ohms). For this problem, the resistance at each resistor (ohms) is calculated to be 45.
- Finally, calculate the Series Current using the formula above:
Is = Vs / Rs
Inserting the values from above and solving the equation with the imputed values gives:
Is = 50 / 45 = 1.111 (volts)
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:
voltage across the resistor (volts) = 400
resistance at each resistor (ohms) = 12
Entering these values into the formula above gives :
Is = Vs / Rs = 33.33 (volts)
