When the stress is increased beyond the elastic limit, the length of the wire starts increasing without increasing the force. This point is called

On applying external force beyond the elastic limit,

On applying external force beyond the elastic limit,

When length of wire is increased by 10% , then increase in resistance is

The point on the stress-strain curve, at which the strain begins to increase, even without increase in stress is called

(A) : Polishing a surface beyond a certain limit increases rather than decreases the frictional forces . (R) : When the surface is polished beyond a certain limit , the molecules exert strong attractive force . This is called surface adhesion , to overcome which additional force is required . Hence frictional force increases .

The point on the stress-strain curve at which the strain begins to increase even without any increase in the stress is

The length of a wire is 4m . Its length is increased by 2mm when a force acts on it. The strain is

When a mass is suspended on a metallic wire, the length of the wire increases slightly. Name and state the law that relates to the restoring force developed in the wire and its deformation.