JEE Main 2009 Physics question
Two wires are made of the same material and have the same volume. However wire 1 has crosssectional area and wire-2 has cross-sectional area . If the length of wire 1 increases by on applying force , how much force is needed to stretch wire 2 by the same amount?
Answer: (4)
Solution
Equal volumes: wire 2 has length . for wire 1; for wire 2:
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