Question

Charging by friction is accompanied by loss or gain of electrons. State which body loses electrons when a glass rod is rubbed with silk.
(A) glass rod
(B) silk
(C) hand
(D) both glass rod and silk

Answer 1

Hint: In order to this question, to know the object or body name which loses electrons when a glass rod is rubbed with silk, we will first mention the name of an object and then we will explain the whole phenomenon of rubbing it with silk or silk cloth.


Complete step-by-step solution:
Glass rod loses electrons when a glass rod is rubbed with silk.
When two different materials with differing pulls towards electrons are rubbed together, one substance will take electrons away from the other when the materials are separated, and both will become charged. Charges can be applied to matter in three ways: friction, contact, and induction. Frictional Charging Friction charges materials when they are rubbed together.
When a glass rod is rubbed with silk, the glass rod's electrons are transferred to the silk. The silk is now negatively charged due to an overabundance of electrons. The glass rod, on the other hand, lacks electrons and is hence positively charged. The silk in the preceding case is negatively electrified. As a result, the glass rod loses electrons to the silk in this example of conduction.
The glass rod becomes positively charged after rubbing, whereas the silk becomes negatively charged. As a result of the electron losses, glass acquires a higher order than silk. As a result, when glass is rubbed, it takes on a positive charge while silk takes on a negative charge. Equal yet opposing charges are produced on both of them.
There are many objects that lose electrons after rubbing, such that an ebonite rod when rubbed with fur loses electrons and acquires positive charge.
Hence, the correct option is (A) glass rod.

Note:When one electron is removed from a glass rod, it becomes positively charged. Heat is produced as a result of rubbing, which provides energy for electron elimination. Because the glass rod's work function is smaller than that of the silk cloth, it easily loses electrons to it.