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.
Concept: Heating Effect of Electric Current
Is there an error in this question or solution?
Video Tutorials For All Subjects
- Heating Effect of Electric Current