Introduction To Electric Circuits -

: Provides the electrical "pressure" (voltage) to move charges. Examples include batteries (DC) and wall outlets (AC).

: A device that consumes electrical energy and converts it into another form, such as a light bulb (light), a motor (motion), or a heater (heat).

Every functional circuit requires at least three basic elements, though practical setups often include more:

speaking it's actually the charge value divided by the time. now we the unit for charge is kulum. and the unit for time is second. YouTube·PhysicsHigh 1B: Introduction to Electronic Circuits