I only need help with part c. Thanks! (25%) Problem 3: A conducting spherical sh

Question

I only need help with part c. Thanks!

(25%) Problem 3: A conducting spherical shell of inner radius R1 and outer radius R2 has a point charge +q located at its center. The spherical shell has a net charge of taq. Otheexpertta.com 33% Part (a) Enter an expression for the surface charge density on the inner surface of the spherical shell. 33 Part (b) Enter an expression for the surface charge density on the outer surface of the spherical shell. A 33% Part (c) The electric field at the surface points radially outward and has a magnitude of 7800 NIC. If R 0.5 m, R 1.1 m, and a 3, what is q, in coulombs? Grade Summary Deductions Potential 100%

Explanation / Answer

C) Outer surface has +q charge due to induction

E at surface = q/4piE0 R2^2

q= E *4piE0*R2^2 = 7800*1.1^2 /9e9 = 1.048e-6 C

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