Question: The electric field at point P just outside the outer surface of a hollow spherical conductor of inner radius 10 cm and outer radius 20

The electric field at point P just outside the outer surface of a hollow spherical conductor of inner radius 10 cm and outer radius 20 cm has magnitude 450 N/C and is directed outward. When an unknown point charge Q is introduced into the center of the sphere, the electric field at P is still directed outward but is now 180 N/C.

(a) What was the net charge enclosed by the outer surface before Q was introduced?

(b) What is charge Q? After Q is introduced, what is the charge on the

(d) Outer surface of the conductor?

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