A solid copper sphere (density 
and specific heat capacity 
) of radius r at an initial temperature 200K is suspended inside a chamber whose walls are at almost 0K. The time required (in 
s) for the temperature of the sphere to drop to 100 K is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
[In the given problem fall in temperature of body 
Temperature of surrounding T 0 = 0K, Initial temperature of body T = 200K]
⇒ ⇒ 
[As J = 4.2]
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