GEOLOGY

Detailed explanation-1: -The unit of the electrical resistance, measured with direct current, is the ohm (abbreviated ), named after the German physicist and mathematician Georg Simon Ohm (1789-1854). According to ohm’s law, the resistance R is the ratio of the voltage U across a conductor and the current I flowing through it: R = U / I.

Detailed explanation-2: -ohmmeter, instrument for measuring electrical resistance, which is expressed in ohms. In the simplest ohmmeters, the resistance to be measured may be connected to the instrument in parallel or in series. If in parallel (parallel ohmmeter), the instrument will draw more current as resistance increases.

Detailed explanation-3: -The SI unit of resistance is ohm (symbol ). One ohm is said to be that resistance of a conductor, which is offered when a current of one ampere flows in it while a potential difference of one volt is applied to it.

Detailed explanation-4: -One-ohm is equal to 1 volt / 1 ampere. The SI unit of electrical resistance i.e Ohm is named in honour of the 19th-century German physicist Georg Simon Ohm.