In the context of Maxwell's equations, it is vector field that is one of the inputs of the equation.
Section "Maxwell's equations with pointlike particles" asks if the theory would work for pointlike particles in order to predict the evolution of this field as part of the equations themselves rather than as an external element.
Measured in amperes in the International System of Units.
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Electric charge is a fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. It is a scalar quantity and is responsible for electromagnetic phenomena. Electric charge exists in two types: positive and negative. 1. **Types of Charge**: - **Positive Charge**: Carried by protons, which are found in the nucleus of an atom. - **Negative Charge**: Carried by electrons, which orbit the nucleus of an atom.