Which of the following properties does an electroscope make use of to test whether an object is carrying charge or not ?

Correct option is A

The correct answer is Like charges repel each other.
There are two types of charges found in nature –
1. Positive charge
2. Negative charge
Properties of charges:
• Like charges repel each other.
• Unlike charges attract each other.
• The electroscope is a device that can be used to test whether an object is carrying a charge or not. It was invented by British physician William Gilbert.
• The working principle of an electroscope is based on the atomic structure of the elements, charge induction, the internal structure of metal elements, and the idea that like charges repel each other while unlike charges attract each other.