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If length of a resistance wire become half cross section area become twice then find the relation between old resistance and new resistance ​

Answer»

1:4EXPLANATION:    R=δL/AR=δL/2/2AR=δL/2*1/2AR=δL/4AR=1/4(δL/A)4R=δL/Ar=previous resistancer/R=1/4=1:4hope it HELPS!



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