Deformation of solids - AS CIE Physics

What is the correct unit for strain?

• Pa

• Nm^-2

• No unit

• Nm²

Select all the correct units for stress.

• Pa

• Nm^-2

• Nm²

• No unit

The Young's Modulus is defined as...

• The gradient of a stress strain graph

• The energy required to stretch a material.

• Stress/Strain

• Force/Extension.

Tensile Strain is

• $\frac{Increase\ in\ length}{original\ length}$

• $\frac{decrease\ in\ length}{original\ length}$

• $\frac{change\ in\ volume}{original\ volume}$

• all of the answer

If the material recovers the original dimensions, when an external load is removed, this deformation is known as ______ deformation

• plastic

• permanent

• elastic

• reversible

Hooke's law states that

• the extension is proportional to the load when the elastic limit is not exceeded

• the extension is inversely proportional to the load when the elastic limit is not exceeded

• the extension is independent of the load when the elastic limit is not exceeded

• load is dependent on extension

• X- Glass, Y- Copper, Z- Rubber

• X- Glass, Y- Rubber, Z- Copper

• X- Rubber, Y- Copper, Z- Glass

• X- Rubber, Y- Glass, Z- Copper

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D