31. Two equipotential surfaces surround a +1.50 x 10-8 C point charge. How far is the 190-V surface from the 75.0-V surface?

 

Point charges have spherical equipotential surfaces the radius is found from the potential for a point charge

Solve for radius

Find r for each voltage

 

 

 

 

 

 

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This page last updated on June 11, 2018