What is Current?

What is Current?

• A. The Passage of Electrons Through a Conductor, Flowing or Movement of an Electrical Charge
• B. The Strength of an Electric Current
• C. The Opposing Force to Flow
• D. A Material That Easily Permits Electric Flow

Answer: (A)

Current is the flow of electric charges through a conductor. In a metal, the charge carriers are electrons, so current describes how many coulombs of charge pass a point each second. The key idea is the rate of charge movement, which we measure in amperes. This statement is the best because it directly defines current as the passage or movement of electric charge. The other ideas describe related concepts—resistance is what opposes that flow, and a material that easily permits flow is a conductor—but they do not define what current itself is.

Current is the flow of electric charges through a conductor. In a metal, the charge carriers are electrons, so current describes how many coulombs of charge pass a point each second. The key idea is the rate of charge movement, which we measure in amperes. This statement is the best because it directly defines current as the passage or movement of electric charge. The other ideas describe related concepts—resistance is what opposes that flow, and a material that easily permits flow is a conductor—but they do not define what current itself is.