Touch the disc of an electroscope with an ebonite rod rubbed with fur. Now bring a glass rod rubbed with silk close to the disc of this electroscope. Explain what do you observe?
Answers
Explanation:
In the given problem, touch the disc of an electroscope with an ebonite rod rubbed with fur. Now, bring a glass rod rubbed with silk close to the disc of this electroscope.
When an ebonite rod is rubbed with fur then the ebonite will get negative charge. Now, when it is touched with the metal cap of an electroscope then both the leaves and the metal cap gain negative charge due to conduction.
The divergence of the leaves takes place due to the negative charge on both leaves.
When a glass rod is rubbed with silk then the glass rod will get positive charge.
When it is brought close to the metal cap having negatively charged of this electroscope then the positive charge will get induced in the leaves as result collapsing of the leaves takes place due to the induction.
Answer:The leaves will be electrically neutral.
Explanation: When the ebonite rod is rubbed with fur, it gains a NEGATIVE charge.
When the ebonite rod is touched with the cap of electroscope, the leaves of the electroscope DIVERGE due to the negative charge conducted on it.
When the glass rod is rubbed with silk, the glass rod gains a similar NEGATIVE charge. On bringing the glass rod close to the metal cap of the electroscope, by the process of INDUCTION, the glass rod induces an OPPOSITE charge on the electroscope, that is POSITIVE. Thus, when the negative electroscope gets induced with POSITIVE charges, the leaves collapse, making it electrically NEUTRAL.