2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Thermometry, Calorimetry & Thermal Expansion

JEE Main & Advanced Physics Thermometry, Calorimetry & Thermal Expansion Question Bank Topic Test - Thermometry, Calorimetry & Thermal Expansion

  • question_answer
    A solid object of mass M is made of material of specific heat capacity c, latent heat of fusion L and of very high thermal conductivity. When the object enters the atmosphere from outer space, its temperature below its melting point by \[\Delta T\]. Because of atmospheric friction, it absorbs energy at a constant rate of R. The time before the solid becomes completely molten is

    A) \[\frac{M(C+L)\Delta T}{R}\]     

    B) \[\frac{M(C\Delta T+L)}{R}\]

    C) \[\frac{M(C+L)\Delta T}{R}\]     

    D) \[\frac{R}{(M\Delta T(C+L)}\]

    Correct Answer: B

    Solution :

    : \[R{{t}_{1}}=MC\,\Delta T\] and \[R{{t}_{2}}=Ml\]


You need to login to perform this action.
You will be redirected in 3 sec spinner