Three charged plastic balls, P, Q and R are suspended by insulating threads. Ball P is positively charged.
Diagram 1 shows what happens when ball Q is brought close to ball P.
Diagram 2 shows what happens when ball Q is brought close to ball R.
What are the charges on ball Q and ball R?
charge on ball Q: negative / charge on ball R: negative
2 )
charge on ball Q: negative / charge on ball R: positive
3 )
charge on ball Q: positive / charge on ball R: negative
4 )
charge on ball Q: positive / charge on ball R: positive
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