Question

Figure represents a negatively charged gold leaf electroscope. The distribution of charges on the different parts will be as :

• A. A, D and E will have positive charges. B and C will have no charge.
• B. A, D and E will have negative charges. B and C will have no charge.
• C. A, D and E will have negative charges. B and C will have positive charges.
• D. A, D and E will have positive charges. B and C will have negative charges.

Answer 1

The correct option is B A, D and E will have negative charges. B and C will have no charge.

An electroscope is a device for detecting, measuring and finding the nature of a charge. An electroscope consists of a large earthed jar marked as C. A metal rod D is fitted into the mouth of the jar with the help of the plug B. On top of the plug is the metal disc A where the contact is made for detecting the charge of objects. At the lower end of the metal rod a pair of thin leaves of gold or aluminium marked E is suspended.

In case of a negatively charged electroscope, the parts A, D and E are negatively charged and are conductors. The parts B and D do not possess any charge and are insulators.