| Five small identical metal balls are hung from insulating silk threads and are
ID: 1661830 • Letter: #
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| 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 bals and V exert no force on each other. 2. Metal balls IV and II repel each other. 3. All other pairs of metal balls attract one another. For example, ball IV attracts balls I, III, and v 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. Incorrect: IV and Ii Correct: IV and II Incorrect: I and V Incorrect: and V Incorrect: I and II mputer's answer now shown above. You are c Your receipt no. is 162-4947 Which of the following pairs contain one ball of each charge? Determine whether each statement is correct or incorrect. Correct 1 and 11; Correct IV and III; Incorrect IV and 1 Correct III and V: Correct 1 and 111; Pre Submit Answer Tries 7/12 Prevlous TriesExplanation / Answer
No force between a pair, implies no charge on two balls. hence ball 1 and 5 are neutral.
Repulsive force between a pair, implies, balls carry same charge. Hence 4 and 2 carry same charge.
Attractive force between a pair, implies, either balls carry opposite charge or one is neutral and one of the two carry any +ve or -ve charge (Due to charge induced on metal, it exerts attractive force on any charge). Hence charge on 3 is opposite of that of 4 and 2.
Hence possible pairs, containing one ball of each charge are
3 and 4
and 3 and 2
Only second of the given options is correct.
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