The reciprocal of the resistivity of a material is called
Correct answer: B. Conductivity
- A. Permittivity
- B. Conductivity
- C. Power dissipation
- D. Internal resistance
Explanation
The reciprocal of the resistivity of a material is called conductivity. While resistivity measures how strongly a material opposes the flow of electric current, conductivity measures how easily it allows the current to flow. Conductivity is mathematically defined as the inverse of resistivity. The other options are incorrect because:Permittivity is related to a material's response to an electric field, not its resistance or conductance properties.Power dissipation refers to the conversion of electric power to heat within a circuit, which is not related to the reciprocal of resistivity.Internal resistance is specific to the resistance found within a power source and not a general measure of a material's resistance or conductance.
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About Resistance and Resistivity
Resistance measures opposition to current in a conductor and follows R = V/I for an ohmic conductor, while resistivity is an intrinsic property of the material. Questions use R = ρL/A, examine effects of length, cross-sectional area and temperature, and distinguish resistance, resistivity, conductance and conductivity.
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