Question

As the air around the base of a candle flame is heated, it rises and is replaced by cooler air due to which of following type of heat transfer?

• A. Conduction
• B. Convection
• C. Radiation
• D. Diffraction
• E. Latent heat

Answer 1

Answer: (B)

Convection

Whenever the temperature of any region of a liquid or gas becomes greater than other region ,density of hotter region becomes low for that the particles from high density region (colder region) come there ,that is convection. in the given incident it is happening so it is convection.

In conduction particles don't leave their positions so it not conduction .

In radiation heat is transferred from one point to other without heating the medium so it is also not radiation.

Latent heat is related to state change but there is no state change.

Diffraction is the property of waves , having no relation in this particle system.