- Unlike charges attract .
- like charges repel .
There are two types of charges
Namely :
On loosing electrons , a neutral body acquires positive charge .
On gaining electrons , a neutral body acquires negative charge .
The amount of charge present in a body , either positive or negative , is expressed in terms of an integral number of charge of an electron , which is considered the elementary entity of an electric charge .
Answer:
It depends on the electro-magnetic frequency of the light and object's nature of atoms.
Answer:
Amount of energy required to change the 1kg of a substance without changing its temperature.
