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If the depression 'd' at the end of a loaded bar is given by d=Mg33yi2 where M is the mass,   is the length and y is the young’s modulus, then i has the dimensional formula

a
L2
b
L3T
c
ML3
d
L4

detailed solution

Correct option is A

d=Mgl33Yi2⇒i=Mgl33Yd             i=MLT−2L3ML−1T−2L=L2

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