From Voltage & Current

Specific Resistance

From Conductance

From Conductivity

From Voltage & Current

Specific Resistance

From Conductance

From Conductivity

### Measurement of Resistance or Specific Resistance

Here, I am describing the some important formula for calculating the value of resistor or resistance (R).

In earlier tutorial, I have explained the what is a resistance?.

**1.** According to the Ohm’s law, resistance is calculated from the electric current and voltage.

Resistance, (R)= (Voltage/Current) (Unit- Ohm)

**2. **Calculating the value of resistor (R) or specific resistance by using the important factor, such as resistivity, length and area of conductor.

`Resistance, (R)= [(Resistivity * Length) / Area] (Unit- Ohm) `

**3. **By using the conductance, calculating the value of resistance,

Resistance, (R)= (1/Conductance) (Unit- Ohm)

**4.** By using the conductivity, calculating the value of specific resistance or resistivity,

`Resistivity, (ρ)= (I / Conductivity) (Unit- Ohm.meter)`

These are the different formula for calculating the value of resistance and specific resistance.

You can try or practice the above formula with the help of resistance calculator.