A solid maintained at t1° C is kept in an evacuated chamber a

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement

251.

A solid maintained at t1° C is kept in an evacuated chamber at temperature t2° C (t2 >>t1). The rate of heat absorbed by the body is proportional to

  • t24 − t14

  • (t24 + 273) − (t14 + 273)

  • t2 − t1

  • t22 − t12


C.

t2 − t1

As we know that, the rate of cooling is

    dt = bA θ - θ0

where, bA = constant

 dt  θ - θ0Also, - dTdt  T - T0

where, T = temperature

and      t = time

So, the rate of heat absorbed by cooled body is proportional to t2 − t1


Advertisement
Advertisement