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9th Grade > Physics

WORK AND ENERGY MCQs

Total Questions : 131 | Page 13 of 14 pages
Question 121. An electric lamp produces
  1.    light energy only
  2.    heat energy only
  3.    chemical energy
  4.    light and heat energy
 Discuss Question
Answer: Option D. -> light and heat energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 122. If a pump can lift 80 kg of water through a vertical height of 20 meters in 25 seconds. Then the power of the pump is
  1.    350 watts
  2.    400 watts
  3.    640 watts
  4.    500 watts
 Discuss Question
Answer: Option C. -> 640 watts
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 123. The water stored in damns is used for irrigation and also to generate
  1.    heat energy
  2.    electrical energy
  3.    thermal energy
  4.    chemical energy
 Discuss Question
Answer: Option B. -> electrical energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 124. The potential energy stored in a body of mass 50 kg when it raised to height of 3 m is
  1.    500 J
  2.    1000 J
  3.    1500 J
  4.    100 J
 Discuss Question
Answer: Option C. -> 1500 J
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 125. A nuclear power plant uses the energy released in nuclear reactor to generate electric power is called
  1.    fission
  2.    friction
  3.    hydrogen
  4.    mercury
 Discuss Question
Answer: Option A. -> fission
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 126. Mechanical energy possessed by a body is of
  1.    3 types
  2.    2 types
  3.    4 types
  4.    5 types
 Discuss Question
Answer: Option B. -> 2 types
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 127. If the velocity of a body becomes double, then its kinetic energy will
  1.    remain the same
  2.    become half
  3.    become four times
  4.    become double
 Discuss Question
Answer: Option C. -> become four times
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 128. A body of mass 35 kg is raised to a height of 4 m. If g = 10 ms-2, its potential energy will be
  1.    1400 J
  2.    1500 J
  3.    1300 J
  4.    1600 J
 Discuss Question
Answer: Option A. -> 1400 J
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 129. A solar heating system consists of
  1.    a collector
  2.    a storage device
  3.    a distribution system
  4.    all of above
 Discuss Question
Answer: Option D. -> all of above
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 130. When we raised up a hammer, the energy possessed is called
  1.    kinetic energy
  2.    chemical energy
  3.    nuclear energy
  4.    potential energy
 Discuss Question
Answer: Option D. -> potential energy
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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