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1.
A particular force (F) applied on a wire increases its length by 
To increase the wire's length by 
the applied force will be
To increase the wire's length by the applied force will be
2.
The lower surface of a cube is fixed. On its upper surface, force is applied at an angle of 
from its surface. The change will be of the type
from its surface. The change will be of the type
3.
A fixed volume of iron is drawn into a wire of length 
. The extension 
produced in this wire by a constant force 
is proportional to
. The extension produced in this wire by a constant force is proportional to