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.