Questions
The length of the resistance wire is increased by 10%. What is the corresponding change in the resistance of wire?
detailed solution
Correct option is C
R2R1 = l1l22 , If l1 =100 then l1 =110⇒ R1R2 = 1001102 ⇒ R2=1.21 R1% change R2−R1R1 ×100 =21%Talk 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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