Two small spheres each carrying a charge q are placed r metre apart. If one of the spheres is taken around the other one in a circular path of radius r, the work done will be equal to
A. force between them × r
B. force between them × 2πr
C. force between them/2πr
D. zero
Answer:D
Two small spheres each carrying a charge q are placed r metre apart. If one of the spheres is taken around the other one in a circular path of radius r, the work done will be equal to
A. force between them × r B. force between them × 2πr C. force between them/2πr D. zero