Physics
Grade-8
Easy
Question
A positively charged rod is used to touch the metal knob of an electroscope. The leaves remain parted after it is removed. A negatively charged rod now touches the metal knob. The distance between the leaves
- Increases
- Decreases
- Remains same
- First increases then decrease
Hint:
Like charges repel each other; unlike charges attractLike charges repel each other; unlike charges attract
The correct answer is: Decreases
When a positively charged glass rod touches the metal knob of a gold leaf electroscope, the electrons travel from the leaves to the metal rod. As a result, the leaves become positively charged. Since the charge on both the leaves is the same, they are repelled away from each other, and hence, spread apart.
The distance between the leaves decreases.
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