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A positively charged rod is brought near the cap of a leaf electroscope. The cap is the earthed momentarily by touching with the finger

      

A positively charged rod is brought near the cap of a leaf electroscope. The cap is the earthed momentarily by touching with the finger. Finally the rod is withdrawn. The electroscope is found to be negatively charged. Explain how this charge is acquired.

  

Answers


John
The positive rod attracts the negative charge to the cap and repels the positive charge to the leaf. On earthing, the positive charge is neutralized and when the rod is withdrawn the negative charge on the cap repels each other and redistributes making the electroscope negatively charged
johnmulu answered the question on February 7, 2017 at 07:18


Next: A highly negatively charged rod is gradually brought close to the cap of a positively charged electroscope
Previous: A leaf electroscope A is charged and placed on the bench. Another uncharged leaf electroscope B is placed on the same bench and moved close to A until the caps touch

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