What is the Electric Field Equation for an Electrified Sphere?

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SUMMARY

The electric field equation for an electrified sphere can be derived using Gauss's theorem and the concept of gradient in spherical coordinates. For points inside the sphere (r < R), the charge distribution must be considered, particularly for metallic spheres where charge resides on the surface. The relationship between electric potential (V) and electric field (E) is expressed as V = E · d, but it is essential to apply the correct spherical coordinate transformations to derive accurate results.

PREREQUISITES
  • Understanding of Gauss's theorem
  • Familiarity with electric potential (V) and electric field (E)
  • Knowledge of spherical coordinates
  • Concept of charge distribution in conductive materials
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  • Research the application of Gauss's theorem in electrostatics
  • Study the derivation of electric fields in spherical coordinates
  • Explore the properties of electric potential in conductive materials
  • Learn about the implications of charge distribution on electric fields
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Homework Statement
The function that expresses the electric potential of a metallic electrified sphere is kQ/R if 0<r<R and kQ/r if r>R k=9 × 10^9 Nm2/c2
Find, starting from the electric potential function, the electric field function
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I don't know if i can use V=E · d. I've read about gradient but i never used it so i was asking if there is another way to get tje electric field equation
 
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Look up the expression for gradient in spherical coordinates and set to work. It is not complicated.
 
Or you could express V = V(Q,r) then us Gauss's theorem. For r<R remember where the charge lies on a metallic mass.
 

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