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# Note for Electromagnetic Theory - EMT by Bhubanjit Sahu

• Electromagnetic Theory - EMT
• Note
• Biju Patnaik University of Technology Rourkela Odisha - BPUT
• Electrical and Electronics Engineering
• B.Tech
• 2568 Views
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#### Note for Electromagnetic Theory - EMT by Bhubanjit Sahu

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COORDINATE SYSTEM DEFINITION: A coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of the points in space. ***An orthogonal system is one in which the coordinates are mutually perpendicular.

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CLASSIFICATION OF COORDINATE SYSTEM ORTHOGONAL NON-ORTHOGONAL CARTESIAN OR RECTANGULAR CIRCULAR CYLINDRICAL OR POLAR SPHERICAL Elliptic Cylindrical Parabolic Cylindrical Conical Prolate Spheroidal Oblate Spheroidal Ellipsoidal

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Cartesian Coordinate System z Coordinate variables: x, y and z Point P: (x, y, z) Ranges: -inf < x < inf -inf < y < inf -inf < z < inf P (x, y, z) az ay ax x y Vector A : (Ax, Ay, Az) or Axax+Ayay+Azaz Unit Vectors: ax, ay and az |A| = (Ax2+Ay2+Az2 )1/2

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Cartesian Coordinate System dsz z - dsx •Differential Length: dl =dx ax+dy ay+dz az dx dz dy -dsy dl dsx dy dx x dz dsy - dsz y •Differential Surface or normal area: ds = dy dz ax dz dx ay dx dy az •Differential Volume dv =dx dy dz