What are amps according to the material?

• A. A unit of electrical resistance.
• B. The volume of current which is thought of as the amount of electrons flowing through a wire.
• C. The pressure in a hydraulic system.
• D. The speed of electrons.

Answer: (B)

Amps measure the rate at which electric charge flows through a conductor. It’s a flow rate: how much charge passes a point per second. One ampere means one coulomb of charge crosses that point each second, which in practical terms corresponds to a huge number of electrons (roughly 6.24 x 10^18 per second) moving through the wire.

This is different from resistance, which describes how much a material slows or restricts current; it’s also not a measure of hydraulic pressure, which applies to fluids, or the immediate speed of individual electrons (they drift very slowly, while the current reflects how much charge moves per second). So describing amps as the amount of electrons flowing per unit time captures the idea of current as a flow rate of charge through the circuit.