B.5 Current and circuits
B.5.2—Electrical energy sources
B.5.3—Resistance
B.5.4—Ohmic behaviour
B.5.5—Electrical power
B.5.6—Electrical energy transfer
B.5.7—Electric cells
B.5.8—Conventional current
B.5.9—Current and charge flow
B.5.10—DC and AC
B.5.11—Kirchhoff’s laws
B.5.12—Resistance and resistivity
B.5.13—Series and parallel circuits
B.5.14—Emf and internal resistance
B.5.15—Variable resistance
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