What happens when voltage is applied to a conductor?

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Multiple Choice

What happens when voltage is applied to a conductor?

When voltage is applied to a conductor, an electric field is established along the wire and energy is carried forward by the changing field as current flows. This disturbance travels at a very high speed—close to the speed of light in the conductor—so for typical wiring lengths in a vehicle, the change in voltage is felt essentially at the other end almost immediately. The energy isn’t something you “store” in the wire just by applying voltage, nor is it emitted as light; it’s the moving energy that powers the load. There is a real propagation speed, but it’s so fast that the transmission appears instantaneous for practical purposes.

When voltage is applied to a conductor, an electric field is established along the wire and energy is carried forward by the changing field as current flows. This disturbance travels at a very high speed—close to the speed of light in the conductor—so for typical wiring lengths in a vehicle, the change in voltage is felt essentially at the other end almost immediately. The energy isn’t something you “store” in the wire just by applying voltage, nor is it emitted as light; it’s the moving energy that powers the load. There is a real propagation speed, but it’s so fast that the transmission appears instantaneous for practical purposes.

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