Questions
When the length and area of cross-section both are doubled, then its resistance
detailed solution
Correct option is C
R1 ∝ lA, R2 ∝ 2l2A i.e., R1 ∝ lA∴ R1 = R2Talk to our academic expert!
Similar Questions
In an electrical cable there is a single wire of radius 9 mm of copper. Its resistance is 5Ω . The cable is replaced by 6 different insulated copper wires, the radius of each wire is 3 mm . Now the total resistance of the cable will be
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