How can 1 volt be defined in terms of energy and charge?

The correct definition of 1 volt in terms of energy and charge is that it is equivalent to 1 joule per coulomb. This relationship stems from the fundamental definition of electric potential or voltage, which describes the work done to move a unit charge through an electric potential difference.

To break it down: when we say that the voltage is 1 volt, it means that when 1 coulomb of electric charge moves through an electric potential difference of 1 volt, it gains or requires 1 joule of energy. This establishes a direct link between energy (in joules) and electric charge (in coulombs), hence making the definition clear and precise.

Understanding this relationship is crucial in various applications of electrical engineering and physics, particularly when calculating work done by electric circuits and understanding how energy is transferred through electric fields.