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MHT CET202314 May 2023Morning ShiftPhysicsThermal Properties of MatterActual

A sphere, a cube and a thin circular plate all made of same material and having the same mass are heated to same temperature of 200^ C . When these are left in a room.

Options

  1. Athe sphere reaches room temperature fast
  2. Bthe cube reaches room temperature fast
  3. Cthe circular plate reaches room temperature fast
  4. Dall will reach the room temperature simultaneously

Correct answer

C. the circular plate reaches room temperature fast

Step-by-step solution

= M V ; Given: three objects are' of same materials is same. Also, M = same, volume of objects is samé. For constant volume, amongst the given objects surface area of the plate is maximum. Hence according to Stefan's law dQ dt AT ^4 As A_ plate is maximum, the plate will cool fastest and reaches room temeperature fast.

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