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Multiple Choice

If a material has high thermal conductivity, heat transfer through it is...

High thermal conductivity means the material is good at letting heat pass through it by conduction. The rate of heat transfer by conduction is proportional to the conductivity: larger k leads to more heat flowing for the same temperature difference and cross-sectional area. So, for the same conditions, heat transfer through a material with high conductivity is higher. The other options don’t fit because lower conductivity would reduce heat transfer, no change ignores the material’s properties, and convection is about fluids moving heat, not heat moving through a solid by conduction.

High thermal conductivity means the material is good at letting heat pass through it by conduction. The rate of heat transfer by conduction is proportional to the conductivity: larger k leads to more heat flowing for the same temperature difference and cross-sectional area. So, for the same conditions, heat transfer through a material with high conductivity is higher. The other options don’t fit because lower conductivity would reduce heat transfer, no change ignores the material’s properties, and convection is about fluids moving heat, not heat moving through a solid by conduction.