Current Parallel

Current in Parallel Circuits

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Current in Series

Resistance in Series

Wattage in Series

Voltage in Parallel

Current in Parallel

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Combination 3 Components

Combination 4 Components

Combination 5 Components

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Unbalanced Load

Series Parallel Home

Electrician Math Home

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Current in a Parallel Circuit is Additive.

To find total circuit current, add the current of each component. That will be the total current.

Tip: Think of the whole equaling the sum of its parts. So if you happen to have the total current of a circuit, and the current of all the components except one, can you see where the total current minus the current of all the components except the missing one will produce the current of that missing one? Neat, eh?

Here is the formula for current total in a series circuit with 4 components:

It= I1 + I2 + I3 + I4

If you know the total CURRENT and all the component currents except one, then here are formulas for a circuit with 4 components:

I1 = It - I2 - I3 - I4

I2 = It - I1 - I3 - I4

I3 = It - I1 - I2 - I4

I4 = It - I1 - I2 - I3

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