What is the SI unit of electric current?

Get ready for the NCCER Introduction to Electrical Circuits exam. Study with multiple choice questions, each question comes with hints and explanations. Ace your exam with confidence!

Multiple Choice

What is the SI unit of electric current?

Explanation:
Electric current is the rate at which electric charges flow past a point. The SI unit for that rate is the ampere, abbreviated A. One ampere means that one coulomb of charge passes a given point every second. That ties directly to what current measures—the flow of charge over time. The volt measures electrical potential difference, the watt measures power, and the coulomb is a unit of charge, not a rate. So the unit that matches the concept of current as a flow rate is the ampere.

Electric current is the rate at which electric charges flow past a point. The SI unit for that rate is the ampere, abbreviated A. One ampere means that one coulomb of charge passes a given point every second. That ties directly to what current measures—the flow of charge over time. The volt measures electrical potential difference, the watt measures power, and the coulomb is a unit of charge, not a rate. So the unit that matches the concept of current as a flow rate is the ampere.

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