Conductivity is the
Correct answer: B. reciprocal of resistivity
- A. reciprocal of current density
- B. reciprocal of resistivity
- C. reciprocal of resistance
- D. same as current
Explanation
Conductivity (σ) is the reciprocal of resistivity (ρ), which is a measure of how strongly a material opposes the flow of electric current. Conductivity is defined as σ=1/ ρ .Incorrect options: (a) Current density (J) is related to the flow of current through a given area, but it is not directly related to conductivity.(c) Resistance (R) is the opposition to the flow of current, but conductivity is the reciprocal of resistivity, not resistance.(d) Conductivity is not the same as current; they are different concepts.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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