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Help with physics

  • 15-12-2010 10:40pm
    #1
    jimcorbet
    Registered Users 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


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