Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferMedium2 min
PhysicsMediumsingle choice
The rectangular surface of area 8 cm 4 cm of a black body at temperature C emits energy per second. If the length and breadth are reduced to half of the initial value and the temperature is raised to C, the rate of emission of energy becomes:
Options:
Answer:
D
Solution:
The area becomes . goes from 400 K to 600 K, so increases by . The emission becomes . D.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
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