1.3. Thermal and Electrical Conductivity

Try these first

1. 1.

   What is the thermal conductivity of aluminum?

   Hint

   Think about the units used for measuring thermal conductivity.

2. 2.

   Why is aluminum preferred over copper for overhead power lines?

   Hint

   Consider the properties of both metals.

3. 3.

   What is the thermal conductivity of aluminum?

   • 235 W/m·K
   • 150 W/m·K
   • 300 W/m·K

   Hint

   Remember the usefulness of thermal conductivity in heat management.

4. 4.

   Aluminum is 63% as conductive as which material?

   • Gold
   • Silver
   • Copper

   Hint

   Think of common metals based on their conductivity.

5. 5.

   A new application involves designing a heat sink for a high-performance computer. Discuss the forms of thermal conductivity necessary for optimal performance in this context.

   Hint

   Think about the shape and surface area of the dissipative material.

6. 6.

   Evaluate the potential impacts on structural decisions when choosing aluminum over copper for electrical wiring in a residential building.

   Hint

   Reflect on both cost and installation factors.