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17.5-bo'lim : Stoks teoremasi

  1. \( \displaystyle \iint\limits_{S}{{{\mathop{\rm curl}\nolimits} \vec F\centerdot d\vec S}}\) ni baholash uchun Stokes teoremasidan foydalaning, bunda \(\vec F = {x^3}\,\vec i + \left( {4y - {z^3}{y^3}} \right)\,\vec j + 2x\,\vec k\) va \(S\) \(z = 1\) dan pastdagi \(z = {x^2} + {y^2} - 3\) qismidir, \(z\) o‘qi manfiy yo‘nalishiga yo‘naltirilgan.
  2. \( \displaystyle \iint\limits_{S}{{{\mathop{\rm curl}\nolimits} \vec F\centerdot d\vec S}}\) ni baholash uchun Stokes teoremasidan foydalaning, bunda \(\vec F = 2y\,\vec i + 3x\,\vec j + \left( {z - x} \right)\,\vec k\) va \(S\) \(y = 5\) oldidagi \(y = 11 - 3{x^2} - 3{z^2}\) ning musbat \(y\) o‘qi yo‘nalishiga yo‘naltirilgan qismidir.
  3. \( \displaystyle \int\limits_{C}{{\vec F\centerdot d\vec r}}\) ni baholash uchun Stokes teoremasidan foydalaning, bunda \(\vec F = \left( {z{x^3} - 2z} \right)\,\vec i + xz\,\vec j + yx\,\vec k\) va \(C\) uchburchaklar \(\left( {0,0,4} \right)\), \(\left( {0,2,0} \right)\) va \(\left( {2,0,0} \right)\). Agar siz uchburchakning ustida bo'lsangiz va \(xy\) tekisligiga qarasangiz, \(C\) soat yo'nalishi bo'yicha aylanadi. Egri chiziqning eskizi uchun quyidagi rasmga qarang.
    The curve is a triangle with vertices (0,0,4), (0,2,0) and (4,0,0).  This triangle is completely in the 1st octant and if you are in front of the triangle looking towards the origin It is traced out with a clockwise rotation.
  4. \( \displaystyle \int\limits_{C}{{\vec F\centerdot d\vec r}}\) ni baholash uchun Stokes teoremasidan foydalaning, bunda \(\vec F = {x^2}\,\vec i - 4z\,\vec j + xy\,\vec k\) va \(C\) \(x = - 3\) da radius 1 aylanasi va \(x\) o'qiga perpendikulyar. Agar siz \(x\) o'qini musbat \(x\) o'qidan manfiy \(x\) o'qigacha pastga qaratsangiz, \(C\) soat miliga teskari burilishga ega. Egri chiziqning eskizi uchun quyidagi rasmga qarang.
    This is a sketch with the standard 3D coordinate system.  The positive z-axis is straight up, the positive x-axis moves off to the left and slightly downward and positive y-axis moves off the right and slightly downward.  The circle is centered on the x-axis at x=-3.  If you are standing on the positive x-axis and looking towards the circle there is a counter clockwise orientation to the circle.