An Indian rubber cord L meter long and area of cross-section A 
is suspended vertically. Density of rubber is D 
and Young's modulus of rubber is E 
. If the wire extends by l meter under its own weight, then extension l is
A
B
C
D
L
Text Solution
Verified by ExpertsThe correct answer is:
B
Elongation in a card by its own weight, which act at the center of gravity of the card.
Force 
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