Question

Электрические законы 5 примеров

Answer 1

Есть только 3 закона электротехники:

Закон Ома

Законы Кирхгофа

Закон Джоуля-Ленца.

Закон Ома — эмпирический физический закон, определяющий связь электродвижущей силы источника (или электрического напряжения) с силой тока, протекающего в проводнике, и сопротивлением проводника. Установлен Георгом Омом в 1826 году (опубликован в 1827 году) и назван в его честь.

Первое правило Кирхгофа гласит, что алгебраическая сумма токов ветвей, сходящихся в каждом узле любой цепи, равна нулю. При этом направленный к узлу ток принято считать положительным, а направленный от узла — отрицательным: Алгебраическая сумма токов, направленных к узлу, равна сумме направленных от узла.

Закон Джоуля — Ленца — физический закон, дающий количественную оценку теплового действия электрического тока. Установлен в 1841 году Джеймсом Джоулем и независимо от него в 1842 году Эмилием Ленцем.

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Answer 2

Electric Laws: 5 Examples

Electricity is governed by several fundamental laws that describe the behavior of electric currents, voltages, and resistances. Here are five examples of electric laws:

1. Ohm's Law: Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance. Mathematically, it can be expressed as I = V/R, where I is the current in amperes, V is the voltage in volts, and R is the resistance in ohms. 2. Kirchhoff's Laws: Kirchhoff's Laws are two fundamental principles used to analyze electrical circuits. - Kirchhoff's Current Law (KCL) states that the sum of currents entering a node in a circuit is equal to the sum of currents leaving that node. This law is based on the principle of charge conservation. - Kirchhoff's Voltage Law (KVL) states that the sum of voltages around any closed loop in a circuit is equal to zero. This law is based on the principle of energy conservation. 3. Faraday's Law of Electromagnetic Induction: Faraday's Law states that a change in the magnetic field through a conductor induces an electromotive force (EMF) in the conductor, which in turn creates an electric current. This law forms the basis for the operation of electric generators and transformers. 4. Ampere's Law: Ampere's Law relates the magnetic field around a closed loop to the electric current passing through the loop. It states that the magnetic field produced by a current-carrying conductor is directly proportional to the current and inversely proportional to the distance from the conductor. Ampere's Law is used to calculate the magnetic field strength around current-carrying wires. 5. Coulomb's Law: Coulomb's Law describes the electrostatic force between two charged particles. It states that the force between two charges is directly proportional to the product of their magnitudes and inversely proportional to the square of the distance between them. Mathematically, it can be expressed as F = k * (q1 * q2) / r^2, where F is the force, q1 and q2 are the charges, r is the distance between them, and k is the electrostatic constant. These are just a few examples of the electric laws that govern the behavior of electricity. Each law plays a crucial role in understanding and analyzing electrical circuits and phenomena.

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