What are the two types of electrical charge?

In the context of electrical charge, the two types are positive and negative. These charges are fundamental properties of subatomic particles: protons carry a positive charge, while electrons carry a negative charge. The interaction between these two types of charge is what creates electric forces. Like charges repel each other, while opposite charges attract, which is the basis for many electrical phenomena and applications.

The concept of neutral charge exists but it is not one of the primary types of electrical charge. A neutral object has equal numbers of positive and negative charges, which cancel each other out, resulting in no net charge. Static and dynamic, on the other hand, refer to the nature of electrical systems or phenomena rather than the types of charge themselves. Static charge relates to a buildup of electric charge on a surface, while dynamic charge involves electric currents where charges are in motion. Thus, when identifying the fundamental types of electrical charge, positive and negative are the correct choices.