Question: A negative 30C point charge is 29cm away from the center of a positively charged sphere with radius 4cm and charge density 24C/m^3. What

A negative 30C point charge is 29cm away from the center of

A negative 30C point charge is 29cm away from the center of a positively charged sphere with radius 4cm and charge density 24C/m^3. What is the work done by electric field to put the point charge on the surface of sphere? (k=9*10^9Vm/C)

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