Question

The process due to which an uncharged body acquires electric charges when held near a charged body is called:
A. conduction
B. induction
C. convection
D. None of these

Answer 1

Electric charges arise due to the exchange of electrons. These charges are transferable as the electrons are transferable, so a charged body can transfer charge as well as electrons to the uncharged body. This transfer occurs when both the bodies come in proximity.

Complete answer:
Conduction is defined as the transfer of heat within the solid or between the solids when they are in physical contact.Convection is defined as the transfer of heat from a place to another through fluid movement. It usually occurs in liquid and gases. An example is heat from radiators used in homes.

Induction is defined as the transfer of charges from one charged body to another uncharged body. If a negatively charged body is brought near an uncharged body, the uncharged body will acquire the positive charge. Similarly, when the positively charged body is brought near the uncharged body then the uncharged body will acquire a negative charge.

Hence, the correct option is B.

Note: There are several methods of inducing charge in an uncharged body, like by friction, by conduction, and by conduction. Charging by conduction occurs when both the bodies come in proper physical contact while charging by induction occurs when the bodies are in proximity only, no complete touch is required. Charging by friction occurs when an uncharged body is rubbed over the charged surface or vice-versa.