Ohm's law
Ohm's Law
Ohm's Law (pronounced: /oʊmz lɔː/) is a fundamental concept in the field of Electrical Engineering and Physics. It is named after the German physicist Georg Simon Ohm who first formulated the law in 1827.
Etymology
The term "Ohm's Law" is derived from the name of its discoverer, Georg Simon Ohm. The unit of electrical resistance, the Ohm, is also named in his honor.
Definition
Ohm's Law states that the current passing through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. It is usually expressed by the formula:
I = V/R
where:
- I is the current in amperes (A)
- V is the voltage in volts (V)
- R is the resistance in ohms (Ω)
Related Terms
- Voltage: The electric potential difference between two points.
- Current: The rate at which electric charge flows past a point in a circuit.
- Resistance: The opposition to the flow of electric current, causing the electrical energy to be converted into heat.
- Conductor: A material that allows electric current to flow with minimal resistance.
- Direct Proportionality: A relationship between two quantities where the ratio of their values is constant.
- Inverse Proportionality: A relationship between two quantities where the product of their values is constant.
See Also
External links
- Medical encyclopedia article on Ohm's law
- Wikipedia's article - Ohm's law
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