Current Electricity (part 1)
When charges come in motion, they constitute an electric current. Such currents occur naturally in many situations. Lightning is one such phenomenon in which charges flow from the clouds to the earth through the atmosphere, sometimes with disastrous results. The flow of charges in lightning is not steady, but in our everyday life we see many devices where charges flow in a steady manner, like water flowing smoothly in a river. A torch and a cell-driven clock are examples of such devices.
What is current? How important the chapter current electricity is? What is drift of electrons and how resistivity gets originates? What is alternating current? To get these answers, study the video and go through the text given below. When charges come in motion, they constitute an electric current. Such currents occur naturally in many situations. Lightning is one such phenomenon in which charges flow from the clouds to the earth through the atmosphere, sometimes with disastrous results.
To get Current Electricity (part 2) Click Here
This video will also help you to understand the basic laws concerning steady electric currents.