文档介绍：Chapter 6
Current and Resistance
Electric Current.....................................................................................................6-2
Current Density..............................................................................................6-2
Ohm’s Law ...........................................................................................................6-4
Electrical Energy and Power.................................................................................6-7
Summary...............................................................................................................6-8
Solved Problems ...................................................................................................6-9
Resistivity of a Cable.....................................................................................6-9
Charge at a Junction.....................................................................................6-10
Drift Velocity...............................................................................................6-11
Resistance of a Truncated Cone...................................................................6-12
Resistance of a Hollow Cylinder .................................................................6-13
Conceptual Questions .........................................................................................6-14
Additional Problems ...........................................................................................6-14
Current and Current Density........................................................................6-14
Power Loss and Ohm’s Law........................................................................6-14
Resistance of a Cone....................................................................................6-15
Current Density and Drif