9th Class Science Matter in Our Surroundings Question Bank Matter in our Surroundings

  • question_answer
    When does the thermal energy of a body increase?

    A)  When the K.E, of the body decreases.

    B)  When the P.E. of the body increases

    C)  When the mechanical energy of the body decreases

    D)  When the K.E. of molecules in a body increases  

    Correct Answer: D

    Solution :

     Rise in the temperature increases \[K.E.\]of the particles, due to this the particles vibrate more frequently. Hence, heat content of the body increases.


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