Hi im vignesh, please clear my doubt

My point voltage is the force required to pull electrons and current is flow of electrons.
if we consider the main power supply of our house plug point 230 VAC and 5 Amps. until u connect load, current wont come right. then wat is the need of voltage over there. how we are getting that 230 volt without current

How they are creating that voltage.

 

Voltage is the potential, i.e. it is the measure of potential force available to motivate electrons to flow as current.

Consider an analogy: If you climb to the top of a building and hang an object over the edge of the building holding the object in the process - the object has the potential to fall to the ground (analogous to the voltage), however since you are holding the object in your hand the object is static (analogous to the open circuit conditions where there is zero current flow) - Note that there is still potential present. However should you release the object (analogous to connecting the load) it would fall to the ground due to the potential (analogous to current flow).

Try looking here for a better and more detailed explanation.

Dave