What is the mathematical expression for Ohm's law?

What is the mathematical expression for Ohm's law?

• A. R = V/I
• B. P = VI
• C. V = IR
• D. I = V/R

Answer: (C)

Ohm's law expresses the relationship among voltage (V), current (I), and resistance (R) in an electrical circuit. The mathematical expression V = IR shows that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance being the proportionality constant. This means that if you know the current and resistance in a circuit, you can calculate the voltage. This relationship is fundamental in electrical engineering and physics, as it allows for understanding and predicting how electrical circuits behave under various conditions. When current increases while resistance remains constant, voltage must increase accordingly, which is a key principle when designing and analyzing circuits.

Ohm's law expresses the relationship among voltage (V), current (I), and resistance (R) in an electrical circuit. The mathematical expression V = IR shows that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance being the proportionality constant. This means that if you know the current and resistance in a circuit, you can calculate the voltage.

This relationship is fundamental in electrical engineering and physics, as it allows for understanding and predicting how electrical circuits behave under various conditions. When current increases while resistance remains constant, voltage must increase accordingly, which is a key principle when designing and analyzing circuits.