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the answer is B, but why?? The following figure shows a negatively-charged solid

ID: 1440327 • Letter: T

Question

the answer is B, but why?? The following figure shows a negatively-charged solid sphere, and a positively-charged spherical shell. Base on the electric field lines, what can you say about the relative magnitudes of the charges on the two objects? The answer is known if they're inductors, but not if they're conductors. The positively-charged shell has bigger magnitude. The negatively-charged sphere has bigger magnitude. The answer is known if they're conductors, but not if they're insulators. The two objects have exactly the same charge. Four equal positive point charges are located at the corners of a square, their positions in the xy-plane being (1,0), (-1,0), (0,1), and (0,-1). The electric force on a negative point particle located at (3/2,0) points in what direct ion? -j +i -i +j

Explanation / Answer

the efect of negatively charged sphere on the positively charegd spherical shell is negligable.in general inside the sphericla shell electric field is zero but here there is a charged sphere is located inside of the shell.form the center to the shell is distance is more so that electric due to shel has bigger magnitude than the sphere. out side the sphere the total feild is less because shell has positive chareg and sphere has negative charge. so net feild is decreases. so that shell has bigger magnitude than the sphere.