Question

five ball numbered 1 - 5 are suspended using a separate string. pairs (1,2), (2,4), (4,1) show attraction while pairs (2,3), (5,5) are repelled. therefore ball 1 must be
a. positive charged
b. negative charged
c. neutral
d. made of metal
explain

Answer 1

Dear Student , Ball 2 is positively charged then ball 4 is negatively charged because 2 and 4 show attraction. Now, if ball 2 is positively charged then ball 3 is also positively charged because 2 and 3 show repulsion and similarly, ball 5 is negatively charged since 4 and 5 show repulsion. And now, we are left with ball 1 and it can never be positively charged because ball 2 and 1 show attraction, it means ball 1 s negatively charged but it is also not possible because ball 1 and 4 also show attraction. So, ball 1 is neither positively nor negatively charged. It means ball 1 is neutral and made of metal. Regards !