Ohm’s law
1.Sate Ohm’s law?
2.Is Ohms’ law obey in all materials?
3.Draw the graph of V against I
4.What will get from the gradient of this graph?
http://www.allaboutcircuits.com/vol_1/chpt_2/1.html
http://en.wikipedia.org/wiki/Ohm's_law
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