02.24: Two small hollow metal spheres
)cwh06;pn) )v aozrau hung on insulating threads attract one another as shown. It is known that a positively charged rod will att
6waa ))h c upov0)r;znract ball A.
I. Ball A has a positive charge
II. Ball B has a negative charge
III. Ball A and Ball B have opposite charges
Which of the above can be correctly concluded about the charge on the balls?