question_answer

A metallic sphere has a charge of \[10\mu C\]. A unit negative charge is brought from \[A\]to \[B\] both \[100\,cm\] away from the sphere but A being east of it while \[B\]being on west. The net work done is

A)                    Zero

B)                                      \[2/10\ joule\]

C)                    \[-2/10\ joule\]

D)                           \[-1/10\ joule\]

Correct Answer: A

Solution :

    Since \[{{V}_{A}}={{V}_{B}}\] so \[{{W}_{A\to B}}=0\]