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(10%) Problem!4: A conducting spherical shell of inner radius RI and outer radiu

ID: 1882447 • Letter: #

Question

(10%) Problem!4: A conducting spherical shell of inner radius RI and outer radius R2 has a point charge +q located at its center. The spherical shell has a net charge of taq 33% Part (a) Enter an expression for the surface charge density on the inner surface of the spherical shell -g/( 4 R12 ) Correct! 1 33% Part (b) Enter an expression for the surface charge density on the outer surface of the spherical shell q(a+1)/( 4 R22 ) 2 . Correct! × 33% Part (c) The electric field at the surface points radially outward and has a magnitude of 5300 N/C. If R1 = 0.5 m, R,-1.2 m, and a what is q, in coulombs? 6, Grade Summary Deductions Potential 0% 100% q = |41257 * 10-81 Submissions Attempts remaining: 3 (0% per attempt) detailed view cosO tan() ( 7 89 HOME cotan0 asin) atan)acotan) acos0 sinh0 cosh0 n cotanh0 123 0% 0% 0 END Degrees O Radians BACKSPACE DEL CLEAR

Explanation / Answer

C)

Electric field

E= k(q+aq)/r^2

5300= 9*10^9* (7* q)/1.2^2

q= 1.211 *10^-7 C

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D)

E= Q/(A* epsilon_not)

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