What is an electroscope?

What will you observe when the metal top of an electroscope is touched with : a positively charged object ?

What will you observe when the metal top of an electroscope is touched with : a negatively charged object ?

When an object is touched with the metal top of an electroscope, its aluminium leaves diverge. What conclusion do you get from this observation ?

A variable parallel plate capacitor and an electroscope are connected in parallel to a battery. The reading of the electroscope would be decreased by.

In an electroscope if a negatively charged body is brought in contact with the metal clip, the strips of the electroscope diverge. If now another charged object carrying equal amount of prositive charge is brought in contact with the clip, what will happen?

Describe a pith ball electroscope and explain its working.