Questions
A solid sphere and a hollow sphere of the same material and of equal radii are heated to the same temperature. Then select the wrong statement.
detailed solution
Correct option is C
m.s.-dTdt=e.σ.A.T4-T04 ⇒-dTdt∝T4-T04mInitially T = T1 for both spheres and for solid sphere ‘m’ is more . Hence option -(3) is right.Talk to our academic expert!
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For a black body at temperature 727°C, its radiating power is 60W and temperature of surrounding is 227° C. If temperature of black body is changed to 1227°C, then its
radiating power will be :
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