One end of the steel rod is clamped to the roof and the other end is attached to a mass of 
as shown in the figure. The length of the rod is 
and its crosssectional area is 
. The change in the length of the rod due to the weight of the mass is
(Young's modulus of steel 
and acceleration due to gravity 
)
A
B
C
D
. 
Text Solution
Verified by ExpertsThe correct answer is:
A
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