Conductivity is defined as what?

• A. The ability to resist deformation
• B. The ability to conduct heat or electrical energy
• C. The ability to conduct sound only
• D. The ability to reflect light

Answer: (C)

Conductivity describes how energy moves through a material. In this context it means the material’s ability to transfer heat or electrical energy. Metals are good conductors because electrons can move freely and carry energy quickly, enabling efficient heat and electricity transfer. The idea of conducting sound refers to how mechanical waves travel through a medium, which is a different property from conductivity. Reflecting light is about optical interaction with surfaces, not energy transfer inside the material. Resisting deformation relates to mechanical strength or stiffness, not how energy moves. Therefore, the correct interpretation is the ability to conduct heat or electrical energy.