Does the answer depend on the path
along which the charge is brought Solution
(a)  
          = 4 × 104 V
(b) W = qV = 2 × 10–9C × 4 × 104V
     = 8 × 10–5 J
No, work done will be path independent Any arbitrary infinitesimal
path can be resolved into two perpendicular displacements: One along
r and another perpendicular to r The work done corresponding to
the later will be zero