In every closed electrical circuit, current performs work, and the amount of work depends on the strength of the current. The greater the current, the more work it does. However, there is another quantity that affects the work, and it is called electric voltage or simply voltage.
An electroscope is a device used to detect electric charges, which can detect whether an object is electrically charged and estimate the magnitude of the electric charge.
An electromagnet is a coil with a ferromagnetic core inserted into it. The magnetic field of a current-carrying coil is of particular practical interest. If a coil with current is suspended on thin and flexible wires, it will align itself just like a compass needle: one end will point north, and the other end will …
Electric charge is a physical quantity that characterizes the property of objects or particles to interact electromagnetically and determines the magnitude of forces and energies during such interactions.
Coulomb’s law states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them. Mathematically, this can be expressed as:
Ohm’s Law This law takes into account the key quantitative characteristics of an electric circuit: Ohm’s Law А law stating that electric current is proportional to voltage and inversely proportional to resistance. To describe an electric circuit that does not contain EMF, you can use Ohm’s law for a section of the circuit. This is …
A semiconductor is a substance that occupies an intermediate position between conductors, which have high electrical conductivity (metals, electrolytes), and dielectrics, which conduct almost no electric current (porcelain, rubber, and others).
Electric current is the ordered movement of charged particles. The words “electric current” and “electricity” are familiar to everyone and are used in homes for lighting (light bulbs, spotlights), transportation, factories, etc. To understand what electric current is, it is necessary to familiarize oneself with a significant range of phenomena. Electrification of a body The …