Young's modulus by searle's apparatus

  • Thread starter babita
  • Start date
  • #1
61
0

Homework Statement



What is the point of using the micrometer in determination of young's modulus of a wire using SEARLES APPARATUS ?

2. Homework Equations
wouldn't the micrometer measure the cross sectional area of the wire....and here we need to measure the extension. I know it is related to spirit level going down when the test wire is loaded..but how????

3. The Attempt at a Solution
 

Attachments

  • image4.jpg
    image4.jpg
    11.8 KB · Views: 1,730

Answers and Replies

  • #2
61
0
:confused:Shouldn't a vernier caliper be used?
 
  • #3
2,479
100
:confused:Shouldn't a vernier caliper be used?

The diagram is labelled incorrectly.Just as you thought a vernier scale(not caliper) is used to measure the extension and a micrometer to measure the wire diameter.

On second thoughts It seems I have referred here to the original Searles design.Having done a quick search it seems that the apparatus can also come in modified and probably improved designs.The original design still gives accurate results but I suggest you google for the other variations.
 
Last edited:
  • #4
61
0
oh...thanks :)
 
Top