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A point charge of -12 μC is located at the origin, which is the center of...

A point charge of -12 μC is located at the origin, which is the center of a thin spherical shell of 10 cm radius. This shell is uniformly charged with 4 μC. What is the electric field at r=5 cm and r=15?

E1 =

V/m,

E2=

V/m.

What is the electric potential at these points?

V1 =

V,

V2=

V.

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