If in case A, elongation in wire of length L is ΔL, then for the same wire, elongation in case B will be
A
4ΔL
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B
2ΔL
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C
ΔL
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D
ΔL2
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Solution
The correct option is CΔL Elongation in the wire is given by (ΔL)=FLAY where F=Force applied L=Length of wire A=Area of cross-section Y=Young's modulus of wire
∵F= Tension(T) and T=W Since, tension in both cases is same and all other parameters Y,A and L are also same. So, elongation will be same in both cases.