Joint Entrance Examination/AIEEE 2009/Q083 YOUNGS MODULUS


Welcome to the Highschool Help Forum!

The forum is currently in "Beta" stage of development. You can ask questions and answer/discuss them. The basic functionalities are present. What's required is a more aesthetic look to the Static pages and a more user friendly setup. This will happen over the time gradually as we start creating some content.

The site has a lot of tools, like posting mathematical calculations, images and diagrams; categorizing questions and so on. Having them here is NO GOOD unless you know how to use them. I am thoroughly against compiling a list of these features and then writing about them. As soon as you do not understand how to do something or use a certain feature, report that on "How To"s Section of the forum. Your queries will be answered there.

If you have any ideas/discussion regarding the site/comments, please go to Discussions regarding Highschool Help Forum

Lastly, thanks for joining in the site's development process! It matters!


Nuvola apps edu miscellaneous.svg


Original Question by 164.100.170.4

Here's the question...

83. Two wires are made of the same material and have the same volume. However wire 1 has cross-sectional area A and wire 2 has cross-sectional area 3A. If the length of wire 1 increases by Δx on applying force F, how much force is needed to stretch wire 2 by the same amount ?

  • (1) 4F
  • (2) 6F
  • (3) 9F
  • (4) F

Posted by 164.100.170.4 04:07, 25 September 2009 (UTC)

Post a reply![1]


Nuvola apps krfb.png


What's Up?

Latest discussions on the forum

Mechanics-Help

  1. Joint Entrance Examination/2000 Screening/Q028 Ball dropped from a height, graphs
  2. Joint Entrance Examination/2000 Screening/Q005 Toppling vs Sliding of a cube
  3. Joint Entrance Examination/2000 Screening/Q004 Roatting triangular frame with beads, what quantities are conserved
  4. Joint Entrance Examination/AIEEE 2009/Q083 YOUNGS MODULUS
  5. Joint Entrance Examination/AIEEE 2009/Q087 ENERGY CONSERVATION


Physics-Help

  1. Joint Entrance Examination/2000 Screening/Q032 Divergent beam passsing from a glass slab
  2. Joint Entrance Examination/2000 Screening/Q031 Magnetic fields of parallel wires
  3. Joint Entrance Examination/2000 Screening/Q028 Ball dropped from a height, graphs
  4. Joint Entrance Examination/2000 Screening/Q026 Ideal gas and graph of a process
  5. Joint Entrance Examination/2000 Screening/Q023 capcitors and dielectric, equivalent capcitance



Browse All Available Categories

Physics: Introductory PhysicsMechanicsHeatWaves and OscillationsElectricity And MagnetismOpticsModern Physics
Mathematics: AlgebraTrigonometryCo-Ordinate (Analytical) GeometryCalculusVectors And 3D GeometryMiscellaneous Topics
Chemistry: General Chemistry and Physical ChemistryOrganic ChemistryInorganic Chemistry
Biology: General BiologyAnatomyPhysiologyBotanyZoology
a a


Stock-brush.svg
Reply to the thread, posted by 164.100.170.4

Thread post

Additional notes

SOLUTION:[3] F/A= YΔl/l ⇒ F =YΔlA2/Al = YΔlA2/V

⇒ F ∝ A2 ⇒ F/F′ =1/9 ⇒ F′ = 9F

These comments, along with the notes on the left, were contributed by 164.100.170.4 04:12, 25 September 2009 (UTC)

Category AIEEE 2009