Sähkövarauksia

Sähkövarauksia refers to electric charges in Finnish. Electric charge is a fundamental property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charge: positive and negative. Like charges repel each other, while opposite charges attract. The SI unit of electric charge is the coulomb, symbolized by C. One coulomb is defined as the charge carried by a current of one ampere flowing for one second. The elementary charge, denoted by e, is the magnitude of the electric charge of a single electron or proton. Its value is approximately 1.602 x 10^-19 coulombs. Protons carry a positive charge of +e, while electrons carry a negative charge of -e. Neutrons, on the other hand, have no net electric charge. The conservation of electric charge is a fundamental principle in physics, stating that the total electric charge in an isolated system remains constant. This means that charge cannot be created or destroyed, only transferred from one object to another or separated within an object. When an object has an excess of electrons, it is said to be negatively charged. Conversely, if it has a deficiency of electrons (or an excess of protons), it is positively charged. Neutral objects have an equal number of protons and electrons, resulting in a net charge of zero. The study of electric charges and their interactions is the domain of electrostatics when charges are at rest, and electrodynamics when charges are in motion, leading to phenomena like electric currents.