Exot On the Oxy plane, we consider a distribution. of surface charges, with. a • uniform distrubution ( density σ), between the circles with center o and radius a b (bra). puunt on the axuS Oz perpendicular Let M bea to the load plane. a) We designate by V(z) the potential function guning the potential V(M) at of the axis √(z) = any point M Oz. Show that we have: [b² + z² = √ a² + z² ) 2 En 67 Derove the expression for the electrostativo fueld this axos. It will be noted that on 콩(대) E(M). Uz M a b Of Represent the graph by taking and a and b Constants. a direct calculation. the expression of the electrostatue fund fueld ECM) by

Exot On the Oxy plane, we consider a distribution. of surface charges, with. a • uniform distrubution ( density σ), between the circles with center o and radius a b (bra). puunt on the axuS Oz perpendicular Let M bea to the load plane. a) We designate by V(z) the potential function guning the potential V(M) at of the axis √(z) = any point M Oz. Show that we have: [b² + z² = √ a² + z² ) 2 En 67 Derove the expression for the electrostativo fueld this axos. It will be noted that on 콩(대) E(M). Uz M a b Of Represent the graph by taking and a and b Constants. a direct calculation. the expression of the electrostatue fund fueld ECM) by

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