02.24: Two small hollow me
mh0mwo tnu;t y46964e w g;bhjtal spheres hung on insulating threads attract one another as shown. It is known that a positively charged rod will attract ball A.
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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?