How elections are held in India
Elections are held in all constituencies at the same time, either on the same day or within a few days. This is called a general election.
Sometimes election is held only for one constituency or two to fill the vacancy caused by death or resignation of a member. This iscalled a by-election.
The country is divided into different areas based on population for the purpose of elections. These areas are called electoral constituencies. For LokSabha elections, the country is divided into 543 constituencies.
Reserved Constituencies and need for Reserved Constituencies
Some constituencies are reserved for people who belong to the Scheduled Castes and Scheduled Tribes. In a reserved constituency only someone who belongs to the Scheduled Castes or Scheduled Tribes can stand for election.
�Our Constitution entitles every citizen to elect its representative and to be elected as a representative. The Constitution makers worried that in an open electoral competition, weaker sections may not stand a good chance to get elected.