What is a volt?

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Multiple Choice

What is a volt?

Voltage is the driving force that pushes electric charges to move through a circuit. It’s the electric potential difference between two points that provides the energy per unit charge to push electrons, so when a circuit path exists, current flows. That’s why the correct choice describes voltage as the driving force that makes electrons flow. It’s not a unit of power (power is watts), not a unit of resistance (that’s ohms), and not a unit of current (current is measured in amperes). A helpful way to connect it is Ohm’s law: V = I R. The voltage sets the potential difference; the current depends on that voltage and the resistance. For example, a 9-volt source across a 3-ohm load yields about 3 amperes of current (I = V/R). The volt is also the energy per unit charge, with 1 volt equaling 1 joule per coulomb.

Voltage is the driving force that pushes electric charges to move through a circuit. It’s the electric potential difference between two points that provides the energy per unit charge to push electrons, so when a circuit path exists, current flows.

That’s why the correct choice describes voltage as the driving force that makes electrons flow. It’s not a unit of power (power is watts), not a unit of resistance (that’s ohms), and not a unit of current (current is measured in amperes).

A helpful way to connect it is Ohm’s law: V = I R. The voltage sets the potential difference; the current depends on that voltage and the resistance. For example, a 9-volt source across a 3-ohm load yields about 3 amperes of current (I = V/R). The volt is also the energy per unit charge, with 1 volt equaling 1 joule per coulomb.

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