The bar ABC in the figure below consists of an AB tube, with an outside diameter of 28 mm and a thickness of 4 mm, connected to a solid bar BC 12 mm in diameter. It is requested to obtain: a) The normal voltage acting on tube AB. b) The normal voltage acting on bar BC.

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Electric Current, Voltage and Electric Power

The term electric current is the flow of electrons or electric charges. The drift of electrons is proportional to the amount of voltage or potential difference applied. The more is the voltage, the more will be the electron drift. The amount of electric current a circuit possesses is proportional to the density of electrons or electric charge.