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That leads me to my question which is if I know how much current and voltage is in a circuit before introducing the inductor into the circuit how am I to calculate how much current and voltage is being eaten by an inductor assuming that I am talking about a commercially bought inductor with defined specifications like for example a 100uh radial coil rated at 5A (this maybe to much inductor for a small 9V circuit maybe one smaller).

How is the forward load found out if there is any change upon introducing a new inductor?