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Question:
When a 4 kg mass is hung vertically on a light spring that obeys Hooke s law the spring stretches by 2 cm. The work required to be done by an external agent in stretching this spring by 5 cm will be

1.4.9 J

2.2.45 J

3.0.495 J

4.0.245 J

Posted Date:-2021-09-26 06:05:18

More MCQS Questions and answers

  1. 1.A load suspended by a massless spring produces an extension of x cm in equilibrium. When it is cut into two unequal parts the same load produces an extension of 7.5 cm when suspended by the large part of length 60 cm. When it is suspended by the smaller part the extension is 5.0 cm. then:
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  6. A force F is required to break a wire or length l and radius r What force is required to break a wire of the same material having twice the length and six times the radius ?
  7. A helical spring extends 40 mm when stretched by a force of 10 N and for tensions up to this value the extension is proportional to the stretching force Two such springs are joined end to-end and the double-length spring is stretched 40 mm beyond its natural length The total strain energy in J stored in the double spring is
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  11. A uniform wire fixed at its upper end hangs vertically and supports a weight at its lower end. If its radius is r its length L and Young s modulus for the material of the wire is E the extension is (1) directly proportional to E(2) inversely proportional to r.(3) directly proportional to L
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  16. A wire of length L and radius r is clamped rigidly at one end When the other end of the wire is pulled by a force F its length increases by l Another wire of the same material of length 4 L and radius 4r is pulled by a force 4F The increase in length will be
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  18. During the time of which Mughal Emperor did the English East India Company establish its first factory in India?
  19. During the time of which Mughal Emperor did the English East India Company establish its first factory in India?
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  22. For gases:
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  24. Gita Gobinda the famous poem was written by
  25. Gita Gobinda the famous poem was written by
  26. Gita Gobinda the famous poem was written by
  27. If the work done in stretching a wire by 1 mm is 2 J the work necessary for stretching another wire of same material but with double radius of cross-section and half the length by 1 mm is
  28. In India, among the following locations, the Dutch established their earliest factory at
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  35. Mangal Pandey fired the first shot of the Revolt of 1857 at
  36. Mangal Pandey fired the first shot of the Revolt of 1857 at
  37. On what factor should the coefficient of restitution depend when two bodies having masses m and M (m < M) collide with each other?
  38. One of the following rulers, who had granted Diwani to the East India Company was
  39. One of the following rulers, who had granted Diwani to the East India Company was
  40. One of the following rulers, who had granted Diwani to the East India Company was
  41. One of the India�s first freedom fighters against British is
  42. One of the India�s first freedom fighters against British is
  43. One of the India�s first freedom fighters against British is
  44. Question
  45. Question
  46. Question
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  48. Sheikh Nizamuddin Auliya was the disciple of
  49. Sheikh Nizamuddin Auliya was the disciple of
  50. The custom Santhara is related to which of the following sects?
  51. The custom Santhara is related to which of the following sects?
  52. The custom Santhara is related to which of the following sects?
  53. The dimensions of four wire of the same material are given below. In which wire the increase in length will be maximum ?
  54. The English East India Company founded a permanent factory at Surat in the year
  55. The English East India Company founded a permanent factory at Surat in the year
  56. The English East India Company founded a permanent factory at Surat in the year
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  61. The fourth Buddhist council was convened during the region of king?
  62. The fourth Buddhist council was convened during the region of king?
  63. The increase in length on stretching a wire is 005% If its Poisson s ratio is 04 the diameter is reduced by
  64. The largest number of Rigvedic hymns are devoted to
  65. The largest number of Rigvedic hymns are devoted to
  66. The largest number of Rigvedic hymns are devoted to
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  69. The length of an elastic string is a metre when the tension is 4 N and b metre when the tension is 5 N. The length in metre when the tension is 9 N is
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  73. The ratio of the adiabatic to isothermal elasticities of a triatomic gas is
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  75. The revolt of 1857 at Lucknow was led by
  76. The revolt of 1857 at Lucknow was led by
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  94. Two wires of the same material and same are stretched by the same force. Their lengths are in the ratio 2 : 3. Their elongations are in the ratio
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  102. When did Queen Victoria declared the taking over of Indian Administration under British Crown?
  103. When did Queen Victoria declared the taking over of Indian Administration under British Crown?
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  111. Which of the following places was named as Khizrabad during the Sultanate period?
  112. Which of the following places was named as Khizrabad during the Sultanate period?
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  120. Which one of the following gives equal importance to Jnana, Karma and Bhakti as a means of liberation?
  121. Which one of the following Sultans of Delhi was refused an audience by Nizamuddin Auliya?
  122. Which one of the following Sultans of Delhi was refused an audience by Nizamuddin Auliya?
  123. Which one of the following Sultans of Delhi was refused an audience by Nizamuddin Auliya?
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  128. Which one of the following was the first fort constructed by the British in India?
  129. Which one of the following was the first fort constructed by the British in India?
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  131. Who among the following Sultans of Delhi founded the city of Agra?
  132. Who among the following Sultans of Delhi founded the city of Agra?
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  140. Who is the author of the book �The last Mughal : The fall of a dynasty, Delhi, 1857�?
  141. Who is the author of the book �The last Mughal : The fall of a dynasty, Delhi, 1857�?
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  143. Who of the following has opened that the original homeland of the Aryan was Arctic region?
  144. Who of the following has opened that the original homeland of the Aryan was Arctic region?
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  146. Who of the following was the bitterest enemy of the British during the Revolt of 1857?
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  149. Who was the author of Buddha Charita?
  150. Who was the author of Buddha Charita?
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  152. Who was the first Governor General of Bengal?
  153. Who was the first Governor General of Bengal?
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  155. Who was the founded of Vedic culture?
  156. Who was the founded of Vedic culture?
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  158. Who was the founder of Sunyavada?
  159. Who was the founder of Sunyavada?
  160. Who was the founder of the Sufi order in India?
  161. Who was the founder of the Sufi order in India?
  162. Who was the founder of the Sufi order in India?
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  164. Who was the Governor General of India during the Sepoy Mutiny?
  165. Who was the Governor General of India during the Sepoy Mutiny?
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  167. Who was the teacher of Gautam Buddha?
  168. Who was the teacher of Gautam Buddha?
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  170. Who were the first Europeans to reach India for trade?
  171. Who were the first Europeans to reach India for trade?
  172. You are given three wires A B and C of the same length and cross-section. They are each stretched by applying the same force to the ends. The wire A is stretched least and comes back to its original length when the stretching force is removed. The wire B is stretched more than A and also comes back to its original length when the stretching force is removed. The wire C is stretched most and remains stretched even when stretching force is removed. The greatest Young s modulus of elasticity is possessed by the material of wireABC
  173. Youngs modulus for perfectly inelastic body is:
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