Enter the strength of the emf (volts) and the total resistance (ohms) into the calculator to determine the Initial Current. 

Initial Current Formula

The following formula is used to calculate the Initial Current. 

Ii = EMF / R

  • Where Ii is the Initial Current (amps)
  • EMF is the strength of the emf (volts) 
  • R is the total resistance (ohms) 

How to Calculate Initial Current?

The following two example problems outline how to calculate the Initial Current.

Example Problem #1:

  1. First, determine the strength of the emf (volts). In this example, the strength of the emf (volts) is measured to be 90.
  2. Next, determine the total resistance (ohms). For this problem, the total resistance (ohms) is calculated to be 10.
  3. Finally, calculate the Initial Current using the formula above: 

Ii = EMF / R

Inserting the values from above and solving the equation with the imputed values gives: 

Ii = 90 / 10 = 9 (amps)

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:

strength of the emf (volts) = 80

total resistance (ohms) = 15

Entering these values into the formula or calculator above gives us:: 

Ii = 80/ 15 = 5.33 (amps)