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  1. bibo_dvd

    Problem with electric flux density

    hello guys :) i need your help with this problem i can understand that in (a) we will use the integral of row(v) * dv to get the charge and in (b) we will use the formule D(r)=Q/[4*PI*r^2] but in (C) should it be zero or what ?? and if it should be zero why in the solution manual it...
  2. bibo_dvd

    Problem with Vector Field

    Hello guys !! i have this problems while solving problems on vector calculus .. i solved (a) , (b) as i put P(2,4,3) in the formula of S and i solved it and i solved (b) as a(S)= S/lSl but in (c) i don't how what should i do to solve it ..please help me guys ..Thank you
  3. bibo_dvd

    [help] finding the total electric flux

    hmmm , this means that i will integrate r^2 sin(ceta) *d(ceta)*d(phi) ??
  4. bibo_dvd

    [help] finding the total electric flux

    Hello Guys !!! iam studing the electric flux and how the relationship between D ( electric flux density ) and E ( elecric field) but i found this problem and i don't know which formula should i use to solve it to find the electric flux i know that Q=(Psi)=the electric flux but i...