if length of wire becomes n times then find out ratio of new formed resistance to the original one
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A wire of resistance R is stretched uniformly so that its length becomes n times the original value. The new ... If A′ be the new cross-sectional area, then l′A′=lA ... A copper wire has diameter 0.5 mm and resistivity of 1.6×10.8m. what will be length of this wire to make its
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