1 kcal of heat flowing through a rod of iron per second. When the rod is cut down to 4 pieces then what will be the heat flowing through each piece per second having same temperature gradient?
Text Solution
Verified by ExpertsThe correct answer is:
B
The rate of heat flowing through a conductor is given by
⇒ 
Where K = thermal conductivity of the material
A = area of cross-section
= temperature gradient, t = time
Now if we cut the rod into 4 pieces, A remains same K remains same, 
is said to be same so for same
time t, Q is going to be same as earlier.
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