If you’re studying physics, you’ve likely come across Ohm’s Law. This law states that the current in a circuit is proportional to the voltage and inversely proportional to the resistance. It is one of the most fundamental laws of electricity and electronics. But, when it comes to equations, which one is correct? Let’s explore and find out.

## Exploring Ohm’s Law

Ohm’s Law is named after the German physicist Georg Ohm. He discovered the law in 1827 while studying the relationship between voltage, current, and resistance. Ohm’s Law is expressed in three different equations:

V = IR

I = V/R

R = V/I

The first equation, V = IR, states that the voltage (V) is equal to the current (I) multiplied by the resistance (R). The second equation, I = V/R, states that the current is equal to the voltage divided by the resistance. The third equation, R = V/I, states that the resistance is equal to the voltage divided by the current.

## Comparing Equations

So, which equation is correct according to Ohm’s Law? The answer is all three equations! All three equations represent the same law, but they all express it in different ways. The first equation, V = IR, is the most common form of Ohm’s Law and can be used to calculate the voltage, current, and resistance of any circuit. The second equation, I = V/R, is often used to calculate the current in a circuit. The third equation, R = V/I, is often used to calculate the resistance in a circuit.

In summary, all three equations represent Ohm’s Law and can each be used to calculate voltage, current, and resistance. When studying Ohm’s Law, it’s important to understand each equation and the different ways they can be used.

Ohm’s Law has been a fundamental principle in the world of physics since it was originally discovered by German physicist Georg Ohm in 1827. According to Ohm’s Law, the current flowing through a circuit is directly proportional to the voltage applied to it, as long as the resistance of the circuit remains constant. This relationship can be written in equation form as I = V/R, where I is the current, V is the voltage, and R is the resistance.

In practice, Ohm’s Law is an essential tool for making certain electrical calculations, such as determining the amount of current that will flow through a circuit given a specific voltage. An important note is that any equation derived from Ohm’s Law is only valid if the resistance of the circuit being studied remains constant.

This equation is occasionally modified to make it easier to calculate certain qualities. For example, the voltage can be moved to the other side of the equals sign, resulting in an equation of V = IR. Here, the voltage is multiplied by the resistance to yield the current, thus revealing the power relationship between the three values.

No matter which equation is used to demonstrate the principles of Ohm’s Law, the relationship between the variables remains the same. Whether using the original I = V/R, or the modified V = IR, all valid equations correctly indicate the constant relationship between current, voltage, and resistance. Thus, all equations derived from Ohm’s Law may be considered correct in terms of accurately indicating the physical relationship they represent.