Question

An ebonite rod rubbed with fur and a glass rod rubbed with silk cloth are brought nearer to each other. Then:
A. They will attract each other
B. They will repel each other
C. Nothing will happen to them
D. They will get heated up

Answer 1

Here we will use the concept of Triboelectric effect. Tribo-electric effect is the phenomena of charging due to rubbing or charging an object by friction. Also, the concept of static electricity, it is the most familiar electric phenomenon in which charged particles are transferred from one body to another.

Complete step by step answer:
When an ebonite rod is rubbed with fur it starts gaining electrons and therefore obtains negative charge and when glass rod is rubbed with silk cloth it starts losing electrons and therefore obtains positive charge. Therefore, by the law of static electric charges, two opposite charged objects attract each other.
Therefore, an ebonite rod rubbed with fur and a glass rod rubbed with silk cloth are brought nearer to each other. Then they will attract each other.

So, the correct answer is “Option A”.

Note:
Follow the properties of the elements which tend to gain and lose electrons. The element which gains the electrons becomes the positive charged element and the elements which lose the electrons become positively charged electrons. Remember the three laws of electric charges.
- The opposite charges attract each other.
- The two like charges repel each other.
- The charged objects attract neutral objects.