Questions
Length of a hollow tube is 5 m, its outer diameter is 10 cm and thickness of its wall is 5 mm. If resistivity of the material of the tube is then resistance of tube will be
detailed solution
Correct option is A
By using R=ρ. lA; here A=πr22−r12Outer radius r2=5 cmInner radius r1=5−0.5 = 4.5 cmSo R=1.7 × 10−8 × 5π5 × 10−22 − 4.5 × 10−22=5.6 × 10−5 ΩTalk 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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