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Capacitance between two wires

Discussion in 'Electronics Homework Help' started by Michael777, Sep 1, 2014.

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  1. Michael777


    Sep 1, 2014
    I have two wires of lengths 30cm and 15cm placed 2cm away from each other, with the first wire having a potential of 12v and the other 24v. For wires of equal lengths the capacitance can be calculated by the expression C=[pi*e0*l/cosh^-1(d/a)]. l-the length,d- the distance between the wires and a- the radius.How can I calculate the capacitance between the two wires given their potentials and different lengths? Any suggestions will be really helpful
  2. Miguel Lopez

    Miguel Lopez

    Jan 25, 2012
    If you need to calculate the true value of capacitance, I have no idea.

    But if you need to know if the capacitance would be high, I can tell you the in the college we used a mnemonic in which a pair of twisted wires would have about 2pF/cm. So, in your case, I think the capacitance will be very, very low.
  3. Arouse1973

    Arouse1973 Adam

    Dec 18, 2013
    Here is an example I have done for a 4 m pair of wires 45 mm apart with a radius of 1.5 mm. Hope this helps
    CAP Wires.PNG
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