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electric field inside a solid sphere?[closed]

electric field inside a solid sphere?[closed]


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 


 

Grade:11

1 Answers

kiran kumar
34 Points
7 years ago
Electric Field of Point Charge The electric field of a point charge Q can be obtained by a straightforward application of Gauss` law. Considering a Gaussian surface in the form of a sphere at radius r, the electric field has the same magnitude at every point of the sphere and is directed outward. The electric flux is then just the electric field times the area of the sphere. The electric field at radius r is then given by: If another charge q is placed at r, it would experience a force so this is seen to be consistent with Coulomb`s law. Charged conducting sphere Sphere of uniform charge Fields for other charge geometries Index Electric field concepts HyperPhysics***** Electricity and Magnetism R Nave Go Back Electric Field of Conducting Sphere The electric field of a conducting sphere with charge Q can be obtained by a straightforward application of Gauss` law. Considering a Gaussian surface in the form of a sphere at radius r > R , the electric field has the same magnitude at every point of the surface and is directed outward. The electric flux is then just the electric field times the area of the spherical surface. The electric field is seen to be identical to that of a point charge Q at the center of the sphere. Since all the charge will reside on the conducting surface, a Gaussian surface at r< R will enclose no charge, and by its symmetry can be seen to be zero at all points inside the spherical conductor Point charge Sphere of uniform charge Potential of conducting sphere Fields for other charge geometries Index Electric field concepts HyperPhysics***** Electricity and Magnetism R Nave Go Back Electric Field: Sphere of Uniform Charge The electric field of a sphere of uniform charge density and total charge charge Q can be obtained by applying Gauss` law. Considering a Gaussian surface in the form of a sphere at radius r > R, the electric field has the same magnitude at every point of the surface and is directed outward. The electric flux is then just the electric field times the area of the spherical surface. The electric field outside the sphere (r > R)is seen to be identical to that of a point charge Q at the center of the sphere. For a radius r < R, a Gaussian surface will enclose less than the total charge and the electric field will be less. Inside the sphere of charge, the field is given by: Show Point charge Charged conducting sphere Fields for other charge geometries Index Electric field concepts HyperPhysics***** Electricity and Magnetism R Nave Go Back Inside a Sphere of Charge The electric field inside a sphere of uniform charge is radially outward (by symmetry), but a spherical Gaussian surface would enclose less than the total charge Q. The charge inside a radius r is given by the ratio of the volumes: The electric flux is then given by and the electric field is Note that the limit at r= R agrees with the expression for r >= R. The spherically symmetric charge outside the radius r does not affect the electric field at r. It follows that inside a spherical shell of charge, you would have zero electric field.

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