Questions
A wire of resistance is stretched to twice its original length. The resistance of stretched wire would be :
detailed solution
Correct option is A
R=ρlA=ρl2Al⇒R∝l2Talk 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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