Heat Transfer — Set 3

In a room, a ceiling fan helps cooling mainly by increasing?

Thermal resistance of an insulating layer generally increases when its thickness?

Which statement about conduction is correct?

A room is kept warm by a heater placed near the floor mainly because warm air?

Which of these reduces heat transfer by convection from a hot cup of tea?

A 2 m long rod has cross-sectional area 1×10⁻⁴ m², thermal conductivity 200 W m⁻¹ K⁻¹, and ends at 100°C and 0°C. What is the heat flow rate?

Which process transfers heat in solids without movement of matter as a whole?

Which color of a surface generally reduces heat gain from sunlight the most?

Which term describes heat transfer that does not require contact between bodies?

In a vacuum bottle, silvered surfaces are used mainly to reduce?