Question

An electroscope is a device which is used to find if an object is

• A. charged
• B. magnetic
• C. free of cracks
• D. hot

Answer 1

The correct option is A

charged

Electroscope

1. An electroscope is a device used to detect the presence of an electric charge on a body.
2. It is designed in such a way that two metallic strips are positioned closely together but not joined.
3. When a charged object is placed near the brass disc, the charge moves into the gold leaves and they repel each other and become wide open forming a V shape.
4. When another charged object is placed onto the already charged electroscope, if
   1. the newly kept object has the same kind of charge as the charge of the electroscope, the leaves become even wider.
   2. they are opposite charges, the leaves close some distance between the becoming narrower. The amount of gap closed depends on the magnitude of the charge
5. An electroscope cannot quantitatively measure charge.

Hence, option A is correct.