BioMedical Admissions Test (BMAT) 2025 – 400 Free Practice Questions to Pass the Exam

Heat transfer between two objects is influenced by several factors, one of which is the surface area available for heat exchange. A higher surface area allows for more contact between the two objects, facilitating the transfer of thermal energy. The larger the area that is exposed to the environment, the more opportunities there are for heat to flow between the objects.

When considering other factors that influence heat transfer, such as temperature, while a higher temperature difference between two objects does increase the rate of heat transfer, it is the higher surface area that directly enhances the efficiency of that transfer. Specifically, mechanisms such as conduction and convection benefit from larger surfaces, leading to improved thermal interactions.

In contrast, smaller volume and lower surface area would limit the contact and thus reduce the amount of heat transferred. Therefore, increasing the surface area is a key characteristic that promotes a higher rate of heat transfer between two objects.