What is Ohm's law?

Ohm's law is a law used in physics that basically explains how electricity works correctly in a simple circuit. In order to explain the electrical process, the law shows how three elements of electricity - amplere, resistance and voltage - cooperate to create a functioning electrical circuit. The Act states that the amount of electric current, measured in the amps, the conductor travel is proportional or a straight voltage, but is inversely proportional to the resistance in the conductor.

The petitioner and namesake of the law was George Simon Ohm, a renowned German physicist at the beginning of the 18th century. While he worked as a professor at the Jesuit Grammar School in Cologne in Germany, he experimented and observed the behavior of electricity in simple circuits with different wire lengths. He described and documented all the results in the book "Galvanic District mathematically examined", which was originally rejected, but later recognized, leading to the creation of the law OHM.

Ohm's law can be written in a simple mathematical equation: i = v/r, where it is measured in amps for electric current, V is for voltage and R is for resistance. In this equation, the resistance is usually a constant variable, because its value does not depend on the amount of electric current, but rather on the materials used to produce circuit, such as metal wires and resistor itself. The formula can be expressed in other inverse forms such as v = IR or r = v/i. These inverse formulas can help find the value of one element if the values ​​of the other two elements are already identified.

There are basically three statements of "truth" that one should remember about Ohm's law. The first statement is that the I value increases or decreases if the value V increases or decreases. Seconfers D is that value I decreases if the value r increases and the value V does not change. The third statement is that the value I increases if the value R decreases and the value V remains the same.

principle Ohm's law can bI can virtually applied in equipment and all equipment operated by electricity or battery. For example, a simple light emitting diode (LED) needs only 2 volts and 0.02 amps to light up, but is connected to a 6-volt battery. This can cause an LED to short -circuit and resistance is required to reduce the current. Using the R = V/I formula, it can be determined that a resistor containing 200 ohms is required to check the current coming to the LED.