2. Questions Bank
  3. JEE Main & Advanced
  4. Physics
  5. Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति

JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Self Evaluation Test - Work, Energy and Power

  • question_answer
    An engineer claims to have made an engine delivering 10kW power with fuel consumption of 1 g/s. The calorific value of fuel is 2 kcal/g. This claim is

    A) Valid

    B) Invalid

    C) Depends on engine design

    D) Dependent on load

    Correct Answer: B

    Solution :

    [b] \[P=10\text{ }kW=10000\text{ }W\] Fuel consumption \[=1\text{ }g/s\] Calorific value \[=2\text{ }kcal/g\] \[\therefore \] Energy produced \[=2\text{ }kcal/s\] Input power \[=2\text{ }kcal/s=2000\text{ }cal/s\] \[=2000\times  4.18 J/s=8.4kW\] \[\therefore \] This claim is invalid.


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