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9. Electric Field Inside an Insulator (25 pts.) A spherical insulator has constant charge density, total charge > 0, and radius B. What is the magnitude of the electric field at a distance B/2 from the center of the sphere? Give the answer in terms of Q, B, and K, where K is the constant from Coulombs law. Hint: Use Gausss law.

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The electric field by spherical insulator is

The charge dUity chanst e dla - tota IT 3

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