State and define the S.I unit of resistance

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The S.I. unit of resistance is the ohm, symbolized by the Greek letter omega (Ω).

**Definition:**
1. The ohm is defined as the resistance between two points in a conductor when a constant potential difference of one volt (1 V) applied across those points produces a current of one ampere (1 A) in the conductor. 
2. Mathematically, this relationship is expressed by Ohm's Law, which states:
   $$
   R = \frac{V}{I}
   $$
   where:
   - $$ R $$ is the resistance in ohms (Ω),
   - $$ V $$ is the voltage in volts (V),
   - $$ I $$ is the current in amperes (A).

Thus, one ohm is equivalent to one volt per ampere (1 Ω = 1 V/A).
The S.I. unit of resistance is the ohm (Ω). It measures how much a component or material opposes the flow of electric current. One ohm is defined as the resistance that allows one volt of electric potential difference to produce a current of one ampere.

State and define the S.I unit of resistance

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