What is ohms mean

Definition of Ohm Entry 2 of 2. Georg Simon — German physicist. First Known Use of ohm Noun , in the meaning defined above. Learn More About ohm. Time Traveler for ohm The first known use of ohm was in See more words from the same year. From the Editors at Merriam-Webster. Statistics for ohm Look-up Popularity. Style: MLA. More Definitions for ohm. English Language Learners Definition of ohm. Medical Definition of ohm. Get Word of the Day daily email!

Test Your Vocabulary. Current is proportional to the diameter of the pipe or the amount of water flowing at that pressure. Voltage is an expression of the available energy per unit charge which drives the electric current around a closed circuit in a direct current DC electrical circuit.

Increasing the resistance, comparable to decreasing the pipe size in the water circuit, will proportionately decrease the current, or water flow in the water circuit, which is driven through the circuit by the voltage, which is comparable to the hydraulic pressure in a water circuit.

The relationship between voltage and current is defined in ohmic devices like resistors by Ohm's Law. Ohm's Law is analogous to the Hagen—Poiseuille equation, as both are linear models relating flux and potential in their respective systems. Electric current I is a rate of flow and is measured in amps A. Ohms R is a measure of resistance and is comparable to the water pipe size. An "amp", short for ampere, is a unit of electrical current which SI defines in terms of other base units by measuring the electromagnetic force between electrical conductors carrying electric current.

A "watt" is a measure of power. One watt W is the rate at which work is done when one ampere A of current flows through an electrical potential difference of one volt V. A watt can be expressed as It is important to know the terms and formulas on this page because they are helpful in calculating the amount of power and the size of a solar power system, whether it is an off-grid system or one that is grid-connected.

There is also a formula for power. In this formula, P is power, measured in watts , I is the current , measured in amperes , and V is the potential difference or voltage drop across the component, measured in volts. A unit of electrical resistance equal to that of a conductor in which a current of one ampere is produced by a potential of one volt across its terminals. Published by Houghton Mifflin Company. The SI derived unit used to measure the electrical resistance of a material or an electrical device.

One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it. Georg Simon German physicist who discovered the relationship between voltage, current, and resistance in an electrical circuit, now known as Ohm's law. The ohm unit of electrical resistance is named for him.