Question

Which of the following represent practical uses each of good conductors of heat?

• A. Cooking vessels are coated with copper at the base so as to readily absorb heat energy and get the food cooked quickly, thus saving time and fuel
• B. Mercury is used as a thermometric liquid as it is a good conductor of heat
• C. Cooling coils of refrigerators and air-conditioners are made of copper as they easily conduct away the heat
• D. None of the above

Answer 1

Answer: (A), (B), (C)

The correct options are
A Cooking vessels are coated with copper at the base so as to readily absorb heat energy and get the food cooked quickly, thus saving time and fuel
B Mercury is used as a thermometric liquid as it is a good conductor of heat
C Cooling coils of refrigerators and air-conditioners are made of copper as they easily conduct away the heat

Cooking vessel are coated with copper at base, so as to readily absorb heat and get food cooked quickly thus saving the fuel and time as copper is good conductor of heat and it has comparatively more thermal conductivity.

Mercury is used in thermometer as it is good conductor of heat; it expands on heating accordingly.

Cooling coils of refrigerators and air-conditioners are mode of copper as they easily conduct away the heat. As copper has high thermal conductivity; it absorbs heat more quickly and in that coils, coolants are present to absorb heat.