How does the resistance of a wire vary with its:
We know that the area of cross-section, A = πr2 = π (d / 2)2, where r is the radius and d is the diameter of the wire. So on increasing the diameter of the wire, its resistance decreases.
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- Heating Effect of Electric Current
Solution How Does the Resistance of a Wire Vary with Its: Diameter? Concept: Heating Effect of Electric Current.