The Combined Resistance of Circuits in Series
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-388
2025-12-11
21
The resistance of 100 feet of a given wire is twice the resistance of fifty feet of the same wire. This is evident when we consider the expression for the resistance of a wire 
Since the resistance is directly proportional to the length, the final resistance is the same whether the wire is all in one piece or in two pieces joined together end to end. When conductors are coupled in series (Fig. 1), each adds its own resistance, so that the combined resistance of circuits in series is R = r +r' + r" etc., in which r; r', and r" are the individual resistances of the circuits, that are joined in series.
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