The distance between charges +q and –q is 2l and between +2 q and -2 q is 4l. The electrostatic potential at point P at a distance r from centre O is  

                                 JEE-2024         

Solution:                
The distance between charges +q and –q is 2l and between +2 q and -2 q is 4l. The electrostatic potential at point P at a distance r from centre O is JEE-2024

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