The metal knob of a gold leaf electroscope is touched with a positively charged rod. When it is taken away the leaves stay separated. Now the metal knob is touched by negatively charged rod. The separation between the leavesincreasesdecreasesremains samefirst increases then decreases.
Question
The metal knob of a gold leaf electroscope is touched with a positively charged rod. When it is taken away the leaves stay separated. Now the metal knob is touched by negatively charged rod. The separation between the leavesincreasesdecreasesremains samefirst increases then decreases.
Solution
When a positively charged rod touches the metal knob of a gold leaf electroscope, it transfers some of its positive charge to the electroscope. This causes the leaves of the electroscope to repel each other and stay separated because they are both positively charged.
When a negatively charged rod is then brought into contact with the metal knob, it will transfer some of its negative charge to the electroscope. This will neutralize some of the positive charge on the electroscope. As a result, the leaves will experience less repulsion and the separation between them will decrease.
So, the correct answer is: the separation between the leaves decreases.
Similar Questions
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