# Name the unit of electrical resistance and give its symbol

## What is the Unit of Electrical Resistance? Understanding the Ohm (Ω)

Electrical resistance is a material’s opposition to the flow of electric current. The unit of electrical resistance Ohm (Ω) is crucial for quantifying this opposition and is essential in various calculations and applications within electrical engineering and physics.

### The Unit of Electrical Resistance: Ohm

The unit of electrical resistance is the ohm, symbolized by the Greek letter omega (Ω). The ohm is a derived unit of electrical resistance in the International System of Units (SI). We can define it as the resistance between two points of a conductor when a constant potential difference of one volt, applied across these points, produces a current of one ampere. This definition is mathematically expressed by Ohm’s Law, which states:

Where:

• R is the resistance in ohms (Ω),
• V is the voltage in volts (V),
• I is the current in amperes (A).

### Symbol of Resistor

The symbol for electrical resistance is R. In the equation, the letter R represents the electrical resistance, while the ohm, symbolized by the Greek letter omega (Ω), represents the unit of electrical resistance.

### The Importance of the Ohm

Understanding the unit of electrical resistance and its symbol is vital for anyone working with electrical circuits. The ohm measures how much a resistor or any component in a circuit resists the flow of electric current. This resistance affects how much current will flow for a given voltage, directly influencing the behavior of electrical devices.

### Practical Applications of Resistance Measurement

In practical applications, resistors are commonly used to control current in circuits. Their resistance values are specified in ohms. These resistors are color-coded to indicate their resistance value, making them easy to identify and use in designing and repairing electronic circuits.

In summary, the unit of electrical resistance is the ohm (Ω), a fundamental unit that plays a crucial role in understanding and managing electric currents in various applications.