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The Magnetic Field at Any Point in the Xy Plane π\pi

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The magnetic field at any point in the xy plane is given by  The magnetic field at any point in the xy plane is given by   , where   is the position vector of the point, A is a constant, and   is a unit vector in the +z direction.The net current through a circle of radius R, in the xy plane and centered at the origin is given by: A)    \pi  AR<sup>2</sup>/  \mu  <sub>0</sub>  B)  2  \pi  AR/  \mu  <sub>0</sub>  C)  4  \pi  AR<sup>3</sup>/3  \mu  <sub>0</sub>  D)  2  \pi  AR<sup>2</sup>/  \mu  <sub>0</sub>  E)    \pi  AR<sup>2</sup>/2  \mu  <sub>0</sub>  , where  The magnetic field at any point in the xy plane is given by   , where   is the position vector of the point, A is a constant, and   is a unit vector in the +z direction.The net current through a circle of radius R, in the xy plane and centered at the origin is given by: A)    \pi  AR<sup>2</sup>/  \mu  <sub>0</sub>  B)  2  \pi  AR/  \mu  <sub>0</sub>  C)  4  \pi  AR<sup>3</sup>/3  \mu  <sub>0</sub>  D)  2  \pi  AR<sup>2</sup>/  \mu  <sub>0</sub>  E)    \pi  AR<sup>2</sup>/2  \mu  <sub>0</sub>  is the position vector of the point, A is a constant, and  The magnetic field at any point in the xy plane is given by   , where   is the position vector of the point, A is a constant, and   is a unit vector in the +z direction.The net current through a circle of radius R, in the xy plane and centered at the origin is given by: A)    \pi  AR<sup>2</sup>/  \mu  <sub>0</sub>  B)  2  \pi  AR/  \mu  <sub>0</sub>  C)  4  \pi  AR<sup>3</sup>/3  \mu  <sub>0</sub>  D)  2  \pi  AR<sup>2</sup>/  \mu  <sub>0</sub>  E)    \pi  AR<sup>2</sup>/2  \mu  <sub>0</sub>  is a unit vector in the +z direction.The net current through a circle of radius R, in the xy plane and centered at the origin is given by:


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