Question

25.
(i)
(ii)
(iii)
a) What can you understand from the picture (i) and (ii)?
b) What type of charge is produced in an ebonite rod when it is rubbed with flannel?
c) An unknown charged object is brought near a charged ebonite rod. What is the unknown
charge, if it is attracted by that charged ebonite rod?
d) Who discovered the types of charges in nature?
e) State any two ways of charging an uncharged object.​

Answer 1

Answer:

The phenomena of charging due to rubbing are called Triboelectric effect.

When an ebonite rod is rubbed with fur the rod gets negatively charged because the friction between the fur and the rod makes the ebonite rod to gain an electron from the fur. This is because electrons in fur are less tightly bound than the electrons in the ebonite rod.

When you are rubbing the glass rod with the silk cloth, electrons are stripped away from the atoms in the glass and transferred to the silk cloth. This leaves the glass rod with more positive than negative charge, so you get a net positive charge.