Answer Posted / Sudhir Kumar Giri

Conductivity (σ) is a measure of a material's ability to conduct electricity. It is the reciprocal of resistivity (ρ). Resistivity is a property that quantifies how strongly a material opposes the flow of electric current. Resistance (R) is the measurement of how much opposition a material provides to the current passing through it, often denoted in units of ohms (Ω). The relationship between these three parameters can be expressed by Ohm's law: R = ρ * L / A, where L is the length and A is the cross-sectional area of the conductor.

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