Which electrons are involved in current flow?

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Multiple Choice

Which electrons are involved in current flow?

Explanation:
When a current flows, the moving charge comes from the electrons that can drift in the material. In most solid conductors, that’s the valence electrons—the outermost ones that aren’t tightly bound to a single atom. These electrons can loosen their grip and move under an applied voltage, creating a current. Core electrons stay bound to their atoms and don’t participate in conduction. Protons and neutrons are in the nucleus and don’t move to carry current in ordinary solids. So the electrons involved in current flow are the valence electrons.

When a current flows, the moving charge comes from the electrons that can drift in the material. In most solid conductors, that’s the valence electrons—the outermost ones that aren’t tightly bound to a single atom. These electrons can loosen their grip and move under an applied voltage, creating a current. Core electrons stay bound to their atoms and don’t participate in conduction. Protons and neutrons are in the nucleus and don’t move to carry current in ordinary solids. So the electrons involved in current flow are the valence electrons.

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