What is ohms law
Ohm's law is a fundamental principle in physics that states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. Mathematically, it can be expressed as V=IR, where V is voltage, I is current, and R is resistance.
Important points
- The relationship: Ohm's Law states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) applied across the two points, and inversely proportional to the resistance (R) of the conductor.
- The mathematical formula for Ohm's Law is I = V/R.
- The constant of proportionality: The constant of proportionality between current, voltage, and resistance is called the conductance, which has units of siemens (S).
- Conductance is the reciprocal of resistance, and can be represented as G = 1/R.
- The real-world applications: Ohm's Law has many practical applications in electrical engineering and physics.
- It is used to calculate the resistance of a conductor, to determine the power dissipation in a circuit, and to design electrical circuits and power systems.
- It is a basic principle in the study of electrical circuits, and is essential for understanding many other electrical concepts such as Kirchhoff's laws, circuit analysis, and electronic circuits.