The correct answer is: metal is a good conductor of heat and plastic is an insulator.
Cooking vessels require materials with specific thermal properties. The body of the vessel needs to efficiently transfer heat from the heat source (e.g., stovetop or oven) to the food being cooked. Metals, such as stainless steel or aluminum, are excellent conductors of heat. This means they readily transfer thermal energy, ensuring even and rapid cooking.
On the other hand, the handles of the cooking vessel must remain safe to touch while the vessel is hot. Plastics are good insulators, meaning they resist the flow of heat. This prevents the handles from becoming dangerously hot, ensuring user safety during cooking and handling.
Therefore, the use of metal for the body and plastic for the handles is a deliberate design choice based on the contrasting thermal properties of these materials. Options 1, 3, and 4 are incorrect because they misrepresent the thermal conductivity of metals and plastics.
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Important Questions from Heat and Transfer
In summer season, the top and outer surface of the house are painted white because:
Which of the following is a process in which hot, less dense materials rise upward and are replaced by colder, more dense materials?
What is the heat released by a heating filament rated 24 W when it is kept on for 6 seconds?
Space is left between logs of wood when they are burnt, so that:
On a hot summer afternoon, the tent made up of fabric will be preferred as white colour is:
