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. Home

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:-2021-09-25 23:05:18

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:
  2. 9.If a metal wire of length L having area of cross-section A and Youngs modulus Y behaves as a spring of spring constant k. The value of k is:
  3. A 2 m long rod of radius 1 cm which is fixed from one end is given a twist of 0.8 radius. The shear strain developed will be
  4. A cube of aluminium of sides 0.1 m is subjected to a shearing force of 100 N. The top face of the cube is displaced through 0.02 cm with respect to the bottom face. The shearing strain would be
  5. A force F is needed to break a copper wire having radius R. The force needed to break a copper wire of same length and radius 2R will be
  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
  8. A piece of copper wire has twice the radius of a piece of steel wire The Young s modulus for steel is twice that for the copper One end of the copper wire is joined to one end of the steel wire so that both can be subjected to the same longitudinal force By what fraction of its length of the copper has increased by 1% ?
  9. A spring of constant K is cut into parts of length in the ration 1 : 2. The spring constant of larger one is
  10. A string 1 mm in diameter breaks if the tension in it exceeds 80 N. The maximum tension that may be given to a similar string of diameter 2 mm is
  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
  12. A wire can sustain a weight of 10 kg before breaking If the wire is cut into two equal parts then each part can sustain a weight of
  13. A wire elongates by l mm when a load w is hanged from it If the wire goes over a pulley and two weights w each are hung at the two ends the elongation of the wire will be (in mm):
  14. A wire extends by 1 mm when a force is applied. Double the force is applied to another wire of same material and length but half the radius of cross-section. The elongation of the wire in mm will be
  15. A wire is stretched 1 mm by a force of 1 kN. How far would a wire of the same material and length but of four times that diameter be stretched by the same force ?
  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
  17. A wire suspended vertically from one of its ends is stretched by attaching a weight of 200 N to the lower end. The weight stretches the wire by 1 mm. Then the elastic energy stored in the wire is:
  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?
  20. During the time of which Mughal Emperor did the English East India Company establish its first factory in India?
  21. For a given material the Young s modulus is 24 times that of modulus of rigidity Its Poisson s ratio is
  22. For gases:
  23. Four wires of the same material are stretched by the same load. The dimensions of the wires are as given below. The one which has the maximum elongation is of:
  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. �Buddhist, Hindu and Jain Rock cut caves coexist at
  28. �Buddhist, Hindu and Jain Rock cut caves coexist at
  29. �Buddhist, Hindu and Jain Rock cut caves coexist at
  30. 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
  31. In India, among the following locations, the Dutch established their earliest factory at
  32. In India, among the following locations, the Dutch established their earliest factory at
  33. In India, among the following locations, the Dutch established their earliest factory at
  34. Mangal Pandey fired the first shot of the Revolt of 1857 at
  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
  47. Sheikh Nizamuddin Auliya was the disciple of
  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
  57. The first definite step of provide parliamentary control over East India Company was taken by
  58. The first definite step of provide parliamentary control over East India Company was taken by
  59. The first definite step of provide parliamentary control over East India Company was taken by
  60. The fourth Buddhist council was convened during the region of king?
  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
  67. The length of a wire is increased by 1 mm on the application of given load In a wire of the same material but of length and radius twice that of the first on the application of the same load extension is4 mm
  68. 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 metres when the tension is 9 N is:
  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
  70. The longitudinal extension of any elastic material is very small. In order to have an appreciable change the material must be in the form of:
  71. The modulus of elasticity is dimensionally equivalent to:
  72. The property due to which a material can be hammered into thin sheet is called:
  73. The ratio of the adiabatic to isothermal elasticities of a triatomic gas is
  74. The revolt of 1857 at Lucknow was led by
  75. The revolt of 1857 at Lucknow was led by
  76. The revolt of 1857 at Lucknow was led by
  77. The rivers Ganga and Yamuna are mentioned for the first time in
  78. The rivers Ganga and Yamuna are mentioned for the first time in
  79. The rivers Ganga and Yamuna are mentioned for the first time in
  80. The Sepoy Mutiny took place in the year
  81. The Sepoy Mutiny took place in the year
  82. The Sepoy Mutiny took place in the year
  83. The word Visamatta was used in the latter Vedic Age for
  84. The word Visamatta was used in the latter Vedic Age for
  85. The word Visamatta was used in the latter Vedic Age for
  86. The Youngs modulus of a wire is numerically equal to the stress which will:
  87. Three wires PQ and R of the same material and length have radii 0.1 cm 0.2 cm and 0.3 cm respectively. Which wire has the highest value of Young s modulus of elasticity ?PQR
  88. Two bars A and B of circular cross-section and of same volume and made of the same material are subjected to tension. If the diameter of A is half that of B and if the force applied to both the rods is the same and it is in the elastic limit the ratio of extension of A to that of B will be842
  89. Two identical wires are suspended from the same rigid support but one is of copper and the other is of iron. Young s modulus of iron is thrice that of copper. The weights to be added on copper and iron wires so that the ends are on the same level must be in the ratio of
  90. Two wires of the same length and same material but radii in the ratio of 1 : 2 are stretched by unequal forces to produce equal elongation. The ratio of the two forces is
  91. Two wires of the same material and length are stretched by the same force Their masses are in the ratio 3:2 their elongations are in the ratio:
  92. Two wires of the same material and length are stretched by the same force. Their masses are in the ratio 3 : 2. Their elongations are in the ratio
  93. Two wires of the same material and radius but having length in the ratio of 1 : 2 are stretched with the same force. The ratio of the work done in two cases is
  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
  95. What happen to the elastic property of a substance after annealing (cooling slowly after heating)?
  96. 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
  97. When a certain weight is suspended from a long uniform wire its length increases by one cm. If the same weight is suspended from another wire of the same material and length but having a diameter half of the first one the increase in length will be
  98. When a rubber cord is stretched the change in volume with respect to change in its linear dimensions is negligible. The Poisson s ratio for rubber is
  99. When a weight of 5 kg is suspended from a copper wire of length 30 m and diameter. 0.5 the length of the wire increases by 2.4 cm. If the diameter is doubled the extension produced is
  100. When a weight of 5 kg is suspended from a copper wire of length 30 m and radius 0.5 mm the length of the wire increases by 2.4 cm. If the radius is doubled the extension produced is:
  101. When did Queen Victoria declared the taking over of Indian Administration under British Crown?
  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?
  104. When the intermolecular distance decreases due to compressive force there is:
  105. Where are the traces of Portuguese culture found in India?
  106. Where are the traces of Portuguese culture found in India?
  107. Where are the traces of Portuguese culture found in India?
  108. Which English Governor of East India Company in India was expelled by Aurangzeb?
  109. Which English Governor of East India Company in India was expelled by Aurangzeb?
  110. Which English Governor of East India Company in India was expelled by Aurangzeb?
  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?
  113. Which of the following places was named as Khizrabad during the Sultanate period?
  114. Which of the following substances has the highest value of the Youngs modulus?
  115. Which one of the following commissions is associated with the Army Re-organisation after the suppression of the Revolt of 1857?
  116. Which one of the following commissions is associated with the Army Re-organisation after the suppression of the Revolt of 1857?
  117. Which one of the following commissions is associated with the Army Re-organisation after the suppression of the Revolt of 1857?
  118. Which one of the following gives equal importance to Jnana, Karma and Bhakti as a means of liberation?
  119. Which one of the following gives equal importance to Jnana, Karma and Bhakti as a means of liberation?
  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?
  124. Which one of the following term was used by the Sufis for the successor nominated by the teacher of a particular order or silsila?
  125. Which one of the following term was used by the Sufis for the successor nominated by the teacher of a particular order or silsila?
  126. Which one of the following term was used by the Sufis for the successor nominated by the teacher of a particular order or silsila?
  127. Which one of the following was the first fort constructed by the British in India?
  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?
  130. Who among the following Sultans of Delhi founded the city of Agra?
  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?
  133. Who among the following was NOT associated with the Revolt of 1857?
  134. Who among the following was NOT associated with the Revolt of 1857?
  135. Who among the following was NOT associated with the Revolt of 1857?
  136. Who among the following was the saint of the Varkari Sect?
  137. Who among the following was the saint of the Varkari Sect?
  138. Who among the following was the saint of the Varkari Sect?
  139. Who is the author of the book �The last Mughal : The fall of a dynasty, Delhi, 1857�?
  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�?
  142. Who of the following has opened that the original homeland of the Aryan was Arctic region?
  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?
  145. Who of the following was the bitterest enemy of the British during the Revolt of 1857?
  146. Who of the following was the bitterest enemy of the British during the Revolt of 1857?
  147. Who of the following was the bitterest enemy of the British during the Revolt of 1857?
  148. Who was the author of Buddha Charita?
  149. Who was the author of Buddha Charita?
  150. Who was the author of Buddha Charita?
  151. Who was the first Governor General of Bengal?
  152. Who was the first Governor General of Bengal?
  153. Who was the first Governor General of Bengal?
  154. Who was the founded of Vedic culture?
  155. Who was the founded of Vedic culture?
  156. Who was the founded of Vedic culture?
  157. Who was the founder of Sunyavada?
  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?
  163. Who was the Governor General of India during the Sepoy Mutiny?
  164. Who was the Governor General of India during the Sepoy Mutiny?
  165. Who was the Governor General of India during the Sepoy Mutiny?
  166. Who was the teacher of Gautam Buddha?
  167. Who was the teacher of Gautam Buddha?
  168. Who was the teacher of Gautam Buddha?
  169. Who were the first Europeans to reach India for trade?
  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:
  174. Youngs modulus is defined for:
Search
R4R Team
R4Rin Top Tutorials are Core Java,Hibernate ,Spring,Sturts.The content on R4R.in website is done by expert team not only with the help of books but along with the strong professional knowledge in all context like coding,designing, marketing,etc!