Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferMedium2 min
PhysicsMediumsingle choice
To measure the thermal conductivity of polystyrene (a poor conductor), care must be taken in choosing the dimensions of the specimen and whether lagging is needed. Which is the correct choice?
Options:
Answer:
C
Solution:
A poor conductor passes little heat, so a large area and a small thickness give a measurable heat flow. The side losses are then small compared with the flow through the large faces, so lagging is not needed. C.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
⏱ 2m
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