• An electric heater supplies heat to a system at a rate of 100W. If sys...
  • An electric heater supplies heat to a sy | Class 11 Physics Chapter Thermodynamics, Thermodynamics NCERT Solutions

    Welcome to the NCERT Solutions for Class 11 Physics - Chapter Thermodynamics. This page offers a step-by-step solution to the specific question from Exercise 1, Question 8: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

    Question 8:

    An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of 75 Joules per second. At what rate is the internal energy increasing?

    Answer:

    Heat is supplied to the system at a rate of 100 W.

    ∴Heat supplied, Q = 100 J/s

    The system performs at a rate of 75 J/s.

    ∴Work done, W = 75 J/s

    From the first law of thermodynamics,we have:

    Q = U + W

    Where, U = Internal energy

    ∴U = Q - W

    = 100 - 75

    = 25 J/s

    = 25 W

    Therefore, the internal energy of the given electric heater increases at a rate of 25 W.


    Study Tips for Answering NCERT Questions:

    NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

    • Read the question carefully and focus on the core concept being asked.
    • Reference examples and data from the chapter when answering questions about Thermodynamics.
    • Review previous year question papers to get an idea of how such questions may be framed in exams.
    • Practice answering questions within the time limit to improve your speed and accuracy.
    • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

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    Welcome to the NCERT Solutions for Class 11 Physics - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 8: An electric heater supplies heat to a system at a rate of 100W. If system performs work at a rate of....