A difference in electric potential allows electric charges to flow through a wire due to the movement of charges in response to the established electric field.
A difference in electric potential is required for an electric charge to flow through a wire. This difference in potential, measured in volts, creates an electric field inside the conductor, causing charges to move from one end of the wire to the other, resulting in an electric current.
Resistance, measured in ohms, controls the total current in the circuit. According to Ohm's law (V=IR), a larger voltage results in more current flow if resistance is fixed or lower resistance at the same voltage allows more current to flow.
Charges, such as electrons, move in response to the electric fields established by the potential difference, maintaining a steady flow through the circuit.
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