Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoHeat TransferMedium2 min
PhysicsMediummultiple choice
A metal cylinder of mass 0.5 kg is heated electrically by a 12 W heater in a room at 15°C. The cylinder temperature rises uniformly to 25°C in 5 min and finally becomes constant at 45°C. Assuming that the rate of heat loss is proportional to the excess temperature over the surroundings:
Options:(select one or more)
Answer:
A, B
Solution:
At the final steady state, loss equals input: , so W/°C. At 45°C the loss is 12 W (B). At 20°C it is W (A). C and D are false.
Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer
⏱ 2m
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