1.

A uniform wire of resistance R is uniformly compressed along its length, until its radius becomes n times the original radius.  Now resistance of the wire becomes [KCET 2000]

A.            \[\frac{R}{{{n}^{4}}}\]      
B.            \[\frac{R}{{{n}^{2}}}\]
C.            \[\frac{R}{n}\]                     
D.            nR
Answer» B.            \[\frac{R}{{{n}^{2}}}\]


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