Which process is responsible for the rising of warm air over a heated surface?
Convection
Convection is the process responsible for the rising of warm air over a heated surface, as heated air becomes less dense and rises.
Radiation transfers heat without a medium, Conduction transfers heat through direct contact, and Insulation resists heat transfer — none describe rising warm air.
Hence, Convection is the correct answer.
Which type of surface absorbs more heat and is therefore preferred during winters?
Freezing point of water is
Rate of heat conduction in solids does not depend on
The principle of evaporation of liquid to absorb heat is used in _____.
Which heat transfer method enables the Sun to warm Earth, despite the vast empty space between them?
Thermostat is a device in ovens which helps to maintain a temperature by:
Heat generated in an electrical resistor is measured in which SI unit?
When a metal spoon is placed in a hot cup of tea, it soon becomes warm. Which mode of heat transfer is primarily responsible for this?
In summer season, the top and outer surface of the house are painted white because:
On a hot summer afternoon, the tent made up of fabric will be preferred as white colour is:
The coil of wire used in electric heaters is called a/an________.
Transfer of heat by convection can take place in
A body in motion essentially acquires
A. Kinetic energy
B. Potential energy
C. Mechanical energy
D. Heat energy