9th Class Science Work and energy Question Bank

done Self Test-8 Total Questions - 10

• question_answer1)
  When the force applied and the displacement of the body are inclined at \[\mathbf{90}{}^\circ \]with each other, the work done is:
  A)
   Infinite done clear
  B)
   Maximum      done clear
  C)
   Zero done clear
  D)
   Unity done clear
  E)
   None of these done clear
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• question_answer2)
  Two bullets P and Q, masses 10g and 20 g, are moving in the same direction towards a target with velocities of 20 m/s and 10 m/s respectively. Which one of the bullets will pierce a greater distance through the target?
  A)
   P done clear
  B)
   Q done clear
  C)
   Both are correct done clear
  D)
   both are incorrect done clear
  E)
   None of these done clear
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• question_answer3)
  In the SI system, the unit of P.E. is:
  A)
   Erg done clear
  B)
   Newton        done clear
  C)
   Dyne done clear
  D)
   Joule done clear
  E)
   None of these done clear
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• question_answer4)
  Two unequal masses possess the same momentum, then the kinetic energy of the heavier mass is ________ the kinetic energy of the lighter mass.
  A)
   More done clear
  B)
   Less done clear
  C)
   Equal done clear
  D)
   Insufficient data done clear
  E)
   None of these done clear
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• question_answer5)
  If the speed of a motor car becomes six times then the kinetic energy becomes:
  A)
   6 times done clear
  B)
   12 times done clear
  C)
   24 times done clear
  D)
   36 times done clear
  E)
   None of these done clear
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• question_answer6)
  If a body rolls down a inclined plane then it possesses only:
  A)
   Kinetic energy done clear
  B)
   Potential energy done clear
  C)
   Both done clear
  D)
   Neither done clear
  E)
   None of these done clear
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• question_answer7)
  In which one of the following situation the potential energy of the spring will be minimum?
  A)
   Compressed done clear
  B)
   Extended done clear
  C)
   In its original shape done clear
  D)
   Neither done clear
  E)
   None of these done clear
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• question_answer8)
  What happens to the kinetic energy of the body if its velocity is doubled?
  A)
   Remains same done clear
  B)
   Becomes double done clear
  C)
   Becomes four times done clear
  D)
   Becomes half done clear
  E)
   None of these done clear
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• question_answer9)
  When a stone is thrown upward with a certain speed then its kinetic energy at the highest point is:
  A)
   Maximum done clear
  B)
   Minimum done clear
  C)
   Insufficient data done clear
  D)
   Zero done clear
  E)
   None of these done clear
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• question_answer10)
  An electric bulb of 100 watt is used for 8 hour daily. Find the energy consumption in the month of March.
  A)
   24.8 kwh done clear
  B)
   0.248 kwh done clear
  C)
   2.48 kwh done clear
  D)
   248 kwh done clear
  E)
   None of these done clear
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