Electrical conductivity o is used to specified the electrical character of a material,it is the reciprocal of the resistivity,or[(m) It is indicative of the ease with which a material is capable of conducting an electric current. Ohm's law may be expressed as:J=o8 J is the current density,the current per unit of specimen area l/A,and is the electric field intensity,or the voltage difference between two points divided by the distance separating them.That is,=7Electrical conductivity σ is used to specified the electrical character of a material, it is the reciprocal of the resistivity, or 𝜎 = 1 𝜌 [(Ω-m)]-1 It is indicative of the ease with which a material is capable of conducting an electric current. Ohm’s law may be expressed as: J=σε J is the current density, the current per unit of specimen area I/A, and ε is the electric field intensity, or the voltage difference between two points divided by the distance separating them. That is , 𝜀 = 𝑉 𝑙