Direct Current (DC) Methods
Direct Current (DC) Methods of finding electrical conductivity includes
- Four-Point Probe Method
- Two-Probe Method
Let’s discuss them in detail
Four-Point Probe Method
Four Point Probe method involves applying a known DC voltage across two outer probes (current-carrying probes) and measuring the resulting current. Two inner probes (voltage-sensing probes) are used to measure the voltage drop along the sample. By measuring both the voltage drop and the current, the resistance of the sample can be calculated using Ohm’s law. From the resistance, the conductivity of the material can be determined.
Two-Probe Method
In this simpler method, a known DC voltage is applied across the sample, and the resulting current is measured using two probes. The resistance of the sample is calculated using Ohm’s law, and conductivity is determined from the resistance.
Electrical Conductivity
Electrical conductivity is a fundamental property that measures a material’s ability to conduct electric current. It varies among materials and is influenced by factors such as temperature, material composition, impurities, and pressure. Electrical conductivity is typically measured in siemens per meter (S/m).
Electrical conductivity finds applications in electronics, power transmission, material science, environmental science, geology, biomedical fields, and more. In this article, we learn about electrical conductivity in detail.
Table of Content
- What is Electrical Conductivity?
- Electrical Conductivity Examples
- Electrical Conductivity of Metals
- Factors Influencing Electrical Conductivity
- How is Electrical Conductivity Measured?
- Applications of Electrical Conductivity