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| 1. |
Why is the metal box of the gold-leaf electroscope earthed? |
| Answer» During experiments with a gold-leaf electroscope, free charges exist on the outer surfaces of the tin (metallic) plates used in it. These free charges repel like charges on the leaves and decrease their divergence. Because of earthing of the electroscope, these free charges move to the ground. Hence the sensitivity of the device increases. | |