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Question

If x,y,p,q represent the increase in length, the original length of the experimental wire, load applied to the wire and area of cross-section of the wire respectively then Young's modulus of the wire is given by:

A
xypq
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B
xpyq
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C
pyxq
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D
pqxy
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Solution

The correct option is C pyxq
Original length (L)=y
Extension (l)=x
Force applied (F)=p
Area of cross-section (A)=q
Now, Young's modulus (Y)=FLAlY=ypxq

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