Five small identical metal balls are hung from insulating silk threads and are h

Question

Five small identical metal balls are hung from insulating silk threads and are handled only by the threads. They are not allowed to touch one another during the following experiment. It has previously been found that none of the balls are affected by a magnet. The balls are brought near each other, and the following observations are recorded: 1. Metal balls II and III exert no force orn each other. 2. Metal balls V and I repel each other. 3. All other pairs of metal balls attract one another. For example, a V attracts balls I,IV and II IV In which pairs of balls do both carry charge of the same sign? Determine for each of the following statements whether it is correct or incorrect. V and I; V and III V and IV; 11 and 111; | I and IV; Which of the following pairs contain one ball of each charge? Determine whether each statement is correct or incorrect. II and I; | V and 11 I and III; -v and IV; II and III;

Explanation / Answer

1. V and I are the same charge and sign as they repel each other

2. V and IV contains one ball of each charge.

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