22.  Charges of -q and +2q are fixed in place, with a distance of 2.00 m between them. A dashed line is drawn through the negative charge, perpendicular to the line between the charges. On the dashed line, at a distance L from the negative charge, there is at least one spot where the total potential is zero. Find L.

 

 

 

 

 

 

Cancelling like variables.

Cross multiply

Square both sides

Solve for L

 

 

 

 

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This page last updated on June 9, 2018