Current through wires of different diameter & different material

In a series circuit composed of wires with different diameters and materials, the current remains constant throughout the circuit regardless of variations in resistivity or cross-sectional area. Each wire segment acts as a resistor with resistance determined by its resistivity, length, and diameter. The total voltage drop across the series is the sum of the voltage drops across each wire segment, following Ohm's Law (V = IR). Smaller diameter wires have higher current density, but the current magnitude does not change at junctions between different wires. Wire resistance is typically very low compared to connected components, so voltage drops along wires are usually minimal but measurable. Practical considerations include the current carrying capacity of wires, as excessive current can cause overheating and mechanical failure. Resistance and current can be measured using ohmmeters and ammeters respectively. Common conductive materials mentioned include copper, aluminum, and gold, with resistivity differences influencing voltage drops but not current continuity.
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