Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Help with physics

  • 15-12-2010 9:40pm
    #1
    jimcorbet
    Registered Users, Registered Users 2 Posts: 25 ✭


    Hey guys!
    I was doing the exam papers and came across this question that I couldn't do so I am here for your help!!!!!!
    The question is

    A length of nichrome wire of diameter 0.17 mm is used for the coil.
    Calculate the length of the coil of wire.
    And it gives the Resistivity of nichrome to be 1.1x10^-6

    I would appreciate you help as I am doing physics on my own not in school So THANKS anyway!


Comments

  • #2
    ride-the-spiral
    Registered Users, Registered Users 2 Posts: 1,263 ✭✭✭ride-the-spiral


    The equation for resistivity is Resistance = (Resistivity x length)/Area

    Without knowing the resistance of the wire you can't calculate the length, so i'll presume it needs to be worked out in a previous question. But the main manipulation of the formula is substituting area for pi.r^2 which becomes pi.(d/2)^2.


  • #3
    martsully
    Closed Accounts Posts: 1 ✭martsully


    what year was that


Advertisement