How is one volt defined in relation to current and resistance?

One volt is defined as the electrical potential difference that will cause a current of one ampere to flow through a conductor with a resistance of one ohm. This definition stems from Ohm's Law, which articulates the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit as V = I × R. By rearranging this equation, we can see that if you have a resistance of one ohm and you want a current of one ampere to flow, you need a voltage of one volt.

This relationship illustrates the fundamental principles of electricity, emphasizing how voltage (or electric potential) drives current through resistance. Understanding this is crucial for any budding electrician, as it forms the foundation of circuit analysis and electrical theory.

The other choices do not correctly define a volt or its relation to current and resistance. The definition involving power does not address voltage directly, while the reference to resistance doesn't encompass the necessary relationship with current. The mention of lifting a weight does not pertain to electrical measurements at all, making these alternatives irrelevant in the context of voltage.