A hollow ball of radius 7 cm, made of very thin glass, is rubbed all over with a silk cloth and acquires a negative charge of −9 × 10−8 C that is uniformly distributed all over its surface. Location A...

A hollow ball of radius 7 cm, made of very thin glass, is rubbed all over with a silk cloth and acquires a negative charge of

−9 × 10−8 C that is uniformly distributed all over its surface. Location A in Figure 16.63 is inside the sphere, 1 cm from the

surface. Location B in Figure 16.63 is outside the sphere, 2 cm from the surface. There are no other charged objects nearby.