Electric current defined as charge flow

Steps:

• Recall the basic definition of electric current in physics.
• Identify that current involves movement of charged particles.
• Match the definition to the provided choices.
• Confirm A aligns with standard scientific terminology.

Why A is correct:

• Electric current is defined as the flow of charge carriers, such as electrons or ions, per the formula I = ΔQ/Δt, where I is current and Q is charge.

Why the others are wrong:

• B: Energy carriers describe power transmission, not current itself.
• C: An electron is a single charge carrier, not the flow defining current.
• D: Charge on a particle is static property, unrelated to current's dynamic flow.

Final answer: A