Question

3) Plastomers
force F doubles the length of wire of cross-section a The Young modulus of wire is
3a
F
4a
2a​

Answer 1

Explanation:

Young modulus,

Y=

Δl/l

F/a

.. . . . . . . . . . .(1)

As, Δl=2l−l=l

l

Δl

=1

From equation (1),

Y=

a

F

The correct option is A.

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