Question

In which of the following process, convection does not take place primarily? (a) Sea and land breeze (b)Boiling of water (c) Warming of glass of bulb due ot filament (d) Heating air around a furnace

Answer 1

Answer:

the correct answer is (d) heating air around a furnace

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Answer 2

Non convective method of heat transfer is -

(c) Warming of glass of bulb due to filament

There are three modes of heat transfer namely conduction, convection and radiation.

Conduction is the transfer of heat in solids. Convection is the transfer of heat in fluids. Radiation is the transfer of heat in vacuum. Here, photons transfer the energy.

The gas bulb is evacuated to create vacuum and warming occurs hence here radiation occurs for transfer of heat.