|Class 8 Physics Some Natural Phenomena||Electroscope|
It is an instrument used to detect electric charges.A simple electroscope can be constructed as follows.
The electroscope detects charge in the following way:
Grounding & Discharging
If the charged body was brought close to the electroscope and then, we simultaneously touch the metal plates with your hand, then this would cause the charges to flow through your body ( your body is a good condutor of electricity) to the ground. This is called grounding. The plates no longer repel because their charges are 'discharged' to the ground because of grounding.