Q.
Of the following the fastest process of heat transfer is
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a
conduction
b
convection
c
radiation
d
conduction through silver rod
answer is C.
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Detailed Solution
Radiation is a surface phenomenon. When an atom, residing on the surface of a hot body gains energy, it starts oscillating and quickly emits electro magnetic wave into the surrounding space. Thus radiation of heat occurs and it is a very fast process. So option - (3) is right.
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