• please give explaination also
  
• Two spherical conductors A and B are having charge densities  σA and  σB respectively. If they are joined by a thin wire then what will be the ratio of charge densities finally if the radii are rA and rB. 
• in the electric field of point charge q
  
• Equipotential surface for two identical negative charges?
• why is the electric potential constant when electric field is zero> explain me in detail plss
• The  equipotential  surface  for  a  point charge  of  1nC  has  potential  of  9V .  find  the  radius  of  equipotential  surface .
• What do you know about equipotential surface? Give an example.
• What is the shape of equipotential surface for a given point charge?
• How much work is done in moving a 400 μC charge between two points on an equipotential surface?
• Give main characteristics of an equipotential surface.

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