This video is about water analogy in Dc circuit. In this video a DC circuit is compared with the flow of water. The DC voltage source as pressure, so its forcing flow of electron to the circuit. The flow of electron as water flow in the water analogy. Bulb lamp as turbine in the water analogy. When the voltage is high or the pressure is high, the speed of electron flow is greater and the bulb lamp is turned on and the turbine speed increased. Here is the video: