What is the consumer number in the electricity bill?

Hint: In order to solve this question we need to understand current and how it flows. Current is defined as the number of charge crossings per unit area in unit interval of time. When a wire is subjected to potential difference then an electric field is set up in the wire which binds the free electrons in opposite direction and hence current flows in the same direction as the applied electric field. So in a household $250V$ ac current flows which is consumed by different electrical devices so we get electricity bill as electricity is produced using water which bears cost.

Complete answer:
Consumer number in the electricity bill is a $10$ digit IVRS number or Interactive Voice Response Number which can be used to pay online, it looks like $10XXXXX234$. Consumer number is the identity of electricity users in a state. It is allotted by the electricity board for every new connection. Also nowadays USC (Unified Service Connection Number) is also issued to consumers. Electricity bill is calculated by using the amount of watt consumed multiplied by each watt cost fixed by the government.

Note: It should be remembered that electricity consumed by standard electrical equipment such as refrigerator is $250\,W$ electrical heater $2000\,W$ and similarly Water heater $4000\,W$ but it should be kept in mind that less electricity must be consumed in order to uniformly distribute electricity across country, also it is being recommended to use high rating air conditioner or refrigerator which denotes that electrical device consume less power and is more efficient.