A wire of 13 ohm resistance is stretched to double its length. Find out the new resistance wire
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As we realize that ;
Obstruction = Resistivity*length/territory
Here we take note of that the obstruction is straightforwardly relative to length and conversely corresponding to region of cross area ....
Presently a/c to address,;
Length of wire is twofold then zone is decreased to half...
Presently
New opposition = resistivity*2length/region/2
New opposition =(resistivity*length/area)*4
New opposition = 4resistance
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