What is the inverse of conductivity known as?

• A. Resistance
• B. Reactance
• C. Permittivity
• D. Impedance

Answer: (A)

The inverse of conductivity is known as resistance. Conductivity measures how easily electricity can flow through a material, whereas resistance quantifies how much a material opposes the flow of electrical current. The relationship between conductivity and resistance can be expressed mathematically; resistance is the reciprocal of conductivity. This means that if a material has high conductivity, it will have low resistance, and vice versa. This fundamental relationship is pivotal in understanding electrical circuits and components, making it essential in both chemistry and physics.

Other terms like reactance, permittivity, and impedance, while related to electrical concepts, do not describe the inverse of conductivity directly. Reactance refers specifically to the resistance of capacitors and inductors in alternating current circuits, permittivity relates to how an electric field interacts with a dielectric material, and impedance is a broader term encompassing both resistance and reactance in AC circuits.