A) 4r
B) r/2r
C) r
D) 0.5r
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The Resistance of wire is r ohm. The wire is stritched to double its length, then its resistance will be
A) 4r
B) r/2r
C) r
D) 0.5r
A) 4r
B) r/2r
C) r
D) 0.5r
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