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Work and Energy...

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  • Question 1
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    $$4$$ bulbs rated $$100$$W each, operate for $$6$$ hours per day. What is the cost of the energy consumed in $$30$$ days at the rate of Rs. $$5$$/kWh?

  • Question 2
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    Energy can neither be created nor be destroyed, but it can be changed from one form to another. This law is known as:

  • Question 3
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    Which of the following is not an example of potential energy?

  • Question 4
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    In which of the following cases work is said to be done?

  • Question 5
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    The diagram below shows the path taken by a ball when Sundram kicks it. The potential energy of the ball is highest at ______________

  • Question 6
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    What is the formula for electric power?

  • Question 7
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    When the speed of a body is doubled, its kinetic energy becomes 

  • Question 8
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    A ball bounces to $$80$$% of its original height. What fraction of its potential energy is lost in each bounce?

  • Question 9
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    Which of the following statements is incorrect?

  • Question 10
    1 / -0

    The correct relation between joule and erg is:

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