Two wires are made of the same material and have the same volume. Howe – McqOptions

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1.	Two wires are made of the same material and have the same volume. However first wire has cross- sectional area A and second wire has cross- sectional area 5A. If the length of first wire increases by \[\Delta l\] on applying force f, how much force is needed to stretch second wire by the same amount?
A.	\[14f\]
B.	\[6f\]
C.	\[25f\]
D.	\[9f\]
Answer» D. \[9f\]

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