what do you mean with current?
and do you think I should start new topic for learning?
This is why starting at the very first step is important.
Highschool Physics classes help.
Voltage is measured in Volts.
Current, or Amperage is measured in Amps.
The total power of something is calculated by multiplying the voltage by the current.
Up to you. Ideally, you'll start a new thread for a new project, or for a new question.
(New threads are not created for new questions if they are for the same project)