An electric charge is a fundamental property of matter that causes it to experience electrical and magnetic forces. It can be positive or negative.
Electric charges can be created through several processes, including friction, induction, and contact with other charged objects. They can also be created through chemical reactions or changes in the atomic structure of an object.
An electric field is a region of space around a charged object where the electric force is exerted on other charged objects. The strength of the electric field is determined by the magnitude and direction of the charged object's electric charge.
Electric charges interact with each other through the electric force, which can be attractive or repulsive depending on the charges involved. Like charges repel each other, while opposite charges attract each other.
Electric charges can be measured using an instrument called an electrometer. This device measures the electric potential difference between two points, which is directly related to the amount of electric charge present.