Two identical straight rods of metal are welded end-to-end as shown in Figure (i), 20 cal of heat flows through it in 4 min. If the rods are welded as shown in Figure (ii), the same amount of heat will flow through the rods in
Text Solution
Verified by ExpertsThe correct answer is:
A
Rate of heat flow,
(where, 
thermal resistance)
and parallel resistance, 
)
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