what is a 18 leeter word for flow of charges through the circuit

electrical currents ?

Yes, you're correct! The 18-letter word for the flow of charges through a circuit is "electrical currents."

To arrive at this answer, I performed the following steps:

1. Analyzed the question: The question asked for an 18-letter word describing the flow of charges through a circuit.
2. Considered relevant topic knowledge: I recalled that the flow of charges through a circuit is commonly referred to as "electrical current."
3. Counted the letters: I made sure to count the letters to ensure that the answer met the requirement of being an 18-letter word.
4. Verified the answer: I confirmed that "electrical currents" contains 18 letters, so it is the accurate response to the question.