What is an electrical current?

Study for the Dental Radiology Foundation Chain and Physics Test. Enhance your skills with flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

What is an electrical current?

Electrical current is the flow of electric charges through a conductor. In a metal wire, electrons drift and the current is the rate at which those charges pass a point, measured in amperes (1 ampere = 1 coulomb per second). This emphasizes movement of charge rather than a static buildup of charge. It’s not a force itself, though a field pushes charges to move and create current. It isn’t the energy stored in a component like a capacitor, which is stored in the electric field rather than in ongoing charge movement. Currents can be direct or alternating, depending on the circuit.

Electrical current is the flow of electric charges through a conductor. In a metal wire, electrons drift and the current is the rate at which those charges pass a point, measured in amperes (1 ampere = 1 coulomb per second). This emphasizes movement of charge rather than a static buildup of charge. It’s not a force itself, though a field pushes charges to move and create current. It isn’t the energy stored in a component like a capacitor, which is stored in the electric field rather than in ongoing charge movement. Currents can be direct or alternating, depending on the circuit.

More practice questions