# GEOLOGY

## EARTH SCIENCE

### EARTHQUAKES

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The strain which causes a material to twist is known as
 A stress B tension C compression D shear
Explanation:

Detailed explanation-1: -Strain under a tensile stress is called tensile strain, strain under bulk stress is called bulk strain (or volume strain), and that caused by shear stress is called shear strain.

Detailed explanation-2: -Since twist applies a shear strain, we expect that torque will apply a shear stress.

Detailed explanation-3: -The angular lilt between different layers of a body due to tangential force (Shear Force ) is called Shear Strain .

Detailed explanation-4: -If a torsional load is applied to a material, it will create shear stress, which induces torsional force. If this force is large enough, it can cause the material to twist. This twisting force is called the torsional force.

Detailed explanation-5: -It is an angular change at some point in a shape. Shear strain is the amount of contortion caused by the sliding of plane layers over each other within a deformity that can be applied by elongation, shortening, volume changes or angular distortion. Shear strain can accelerate an objectâ€™s corrosion rate.

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