Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferHard2 min
PhysicsHardstatement
Statement I: A drop of water on a very hot plate (much above C) dances on it for a long time before it vaporises.
Statement II: A layer of vapour forms between the drop and the plate and works as a poor conductor.
Options:
Answer:
A
Solution:
The vapour layer has a low conductivity and keeps the drop from touching the plate, so heat reaches it slowly (the Leidenfrost effect). Both statements are true. A.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
⏱ 2m
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