Turn on thread page Beta

Why the young modulus will be same for both wires? watch

    • Thread Starter
    Offline

    9
    ReputationRep:
    Two Wires A and B, both are made from same material and are of same length but the Cross-Sectional Area of wire B is half of A.

    I know they have same young modulus, is it because extension for wire B will be double...or is there any other reason?
    Offline

    11
    ReputationRep:
    (Original post by jasbirsingh)
    Two Wires A and B, both are made from same material and are of same length but the Cross-Sectional Area of wire B is half of A.

    I know they have same young modulus, is it because extension for wire B will be double...or is there any other reason?
    sorry I dont understand what youre asking for..are you deducing the info(bold) from the given information or are you given the info already
    • Thread Starter
    Offline

    9
    ReputationRep:
    (Original post by rbnphlp)
    sorry I dont understand what youre asking for..are you deducing the info(bold) from the given information or are you given the info already
    It's a question from past paper, it's asking whether the both wire have same Young Modulus or not ... I have looked in the Mark Scheme and it says that they do have same young modulus....I just want to know why ... is it because the extension for Wire B will be double than the extension of Wire A or is there any other reason.
    Offline

    10
    You have the cause and effect the wrong way around.
    The extension (e) for wire B will be double because its cross-section area is half of A; and its original length and Young's Modulus are the same.
    The modulus is the same because it's the same material.
    e=(Fl)/(AE) from E=stress/strain is the starting point for any reasoning.
    Offline

    0
    ReputationRep:
    (Original post by jasbirsingh)
    It's a question from past paper, it's asking whether the both wire have same Young Modulus or not ... in the Mark Scheme it says that they do have same young modulus....I just want to know why ... is it because the extension for Wire B will be double than the extension of Wire A or is there any other reason.
    Because they are made from the same material!
    Offline

    0
    ReputationRep:
    (Original post by Dr.Black Knight)
    Because they are made from the same material!
    Exactly. The Young's modulus is a property of the material rather than a specific object.
    Offline

    11
    ReputationRep:
    (Original post by jasbirsingh)
    It's a question from past paper, it's asking whether the both wire have same Young Modulus or not ... I have looked in the Mark Scheme and it says that they do have same young modulus....I just want to know why ... is it because the extension for Wire B will be double than the extension of Wire A or is there any other reason.
    I thinks since it says it made of the same material , you can say young modulus is the same

    Edit:beaten very badly
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 16, 2010

University open days

  1. Norwich University of the Arts
    Postgraduate Open Days Postgraduate
    Thu, 19 Jul '18
  2. University of Sunderland
    Postgraduate Open Day Postgraduate
    Thu, 19 Jul '18
  3. Plymouth College of Art
    All MA Programmes Postgraduate
    Thu, 19 Jul '18
Poll
How are you feeling in the run-up to Results Day 2018?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.