what is an ohm

An ohm is the unit of electrical resistance in the International System of Units (SI) . It is named after German physicist Georg Simon Ohm. The ohm is defined as an electrical resistance between two points of a conductor when a constant potential difference of one volt (V), applied to these points, produces in the conductor a current of one ampere (A), the conductor not being the seat of any electromotive force. In simpler terms, its the equivalent of one volt per one ampere (V/A) . Ohms are used to measure resistance between two points of a conductor when a constant potential difference of one volt is applied to those points and a current of one ampere is produced. Ohms are sometimes expressed in power-of-10 multiples to accommodate large quantities. For example, one kiloohm is equal to 1,000 (10^3) ohms, and one megaohm is equal to 1,000 kiloohms or 1,000,000 (10^6) ohms. Ohms are used to measure resistance in both direct current (DC) and alternating current (AC) circuits.