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01 Circuit Symbols and Diagrams Problems Loops, meter placement, and predicting readings from correct and faulty wiring. → 02 Electric Current and Charge Problems Charge, time, electron counting, battery ratings, and drift speed. → 03 Voltage and Potential Difference Problems Energy per coulomb, series energy shares, and stored battery energy. → 04 Resistance and Ohm’s Law Problems The V/I ratio, ohmic predictions, I–V gradients, and uncertainty. → 05 Resistivity Problems Material versus shape, wire design, stretching, and measuring ρ. → 06 Series and Parallel Circuits Problems Combination rules, current splitting, dividers, and three-branch networks. → 07 Electric Power Problems P = IV and its resistor forms, ratings, kWh costs, and transmission losses. → 08 Current Calculus Problems Derivatives of Q(t), areas under I–t and P–t graphs, and average versus instantaneous current. →