Question

define charge and give sm xple?

Answer 1

Answer:-

Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. This force is is directly proportional to the charge magnitude.

By convention a electron is considered as 1 unit of negative charge and proton as 1 unit of positive charge.

But in actual flow of electric current or chemical is this electron which participate and not proton(except in nuclear reaction ).  Since electron is -ve, so flow of current is opposite to flow of electron

Good conductors are generally those which have some free electrons which means. There are two region called valence band and conduction band. Depending on availability of electron these energy bands conductivity is determined.

Answer 2

charge is nothing but gaining of energy... for example if u rub a comb continuously to ur hair and pour some peices of paper later to it the paper sticks to the comb...