Ohm's Law and the Basis of Resistor Technology

George Ohm, a German scientist, published his theory of electricity in 1827, defining the link between voltage, current, and his proportionality constant, resistance. He discovered that the current flowing through a circuit between two places is proportional to the voltage applied across the conductor. The voltage required for any given circuit is defined by the product of the current and the resistance of that circuit, or Voltage = Current * Resistance, according to contemporary Ohm's Law.

At some time in their studies, every electrical engineer has encountered the Ohm's Law triangle. When it comes to graphically explaining the formula, it's the "go-to" for teachers. To refresh your memory, a triangle is a visual depiction of the mathematical connection between voltage (V, also known as U or E), resistance (R), and current (I) in a circuit. New engineers can use this triangle to memorize the three fundamental aspects of electricity.

The triangle of Ohm's law is divided into three sections: Voltage must always be on the upper half. The bottom half is then divided into two smaller portions for current and resistance — current is normally on the left, while resistance is on the right, although the order isn't important. It appears that most people write the formula in the triangle as V = I*R since that is how they recall it.

Cover the letter being solved for and utilize the remaining line separation to give you the mathematical formula to solve for one of the variables. When solving for SMD Resistor Codes resistance (R), for example, hide the R so that just V and I remain. Then, using the line that divides those two variables as a guide, divide them.