Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferMedium2 min
PhysicsMediumsingle choice
Two identical rods of a metal are welded as shown in Figure 4.39(a). 20 cal of heat flows through them in 4 minutes. If the rods are welded as shown in Figure 4.39(b), then the same amount of heat will flow in:
Options:
Answer:
A
Solution:
In (a) the rods are end to end (series, resistance ). In (b) they are side by side (parallel, resistance ). The rate is 4 times larger, so the time is minute. A.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
⏱ 2m
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