IT paper

videos:        
 1- Electric charges :http://www.youtube.com/watch?v=QcBVa1VKUdc

2-  Positive and Negative Charges: http://www.youtube.com/watch?v=MStALLM5FuQ
3- What is Voltage: http://www.youtube.com/watch?v=g287MugJC9E 
4- Current | Introduction to electrical engineering | Electrical engineering | Khan Academy: http://www.youtube.com/watch?v=ZRLXDiiUv8Q
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