Bulk properties of solids

Question 1

Elasitcity

Answer 1

it is a property of matter due to which it develops a force within itself to oppose any deforming force. Thus regaining its shape and size when the force is removed.

Question 2

deforming force

Answer 2

the force applied extremely to deform any object is called deforming force

Question 3

restoring force

Answer 3

The force developed internally in an objective in order to restore its shape which was lost due to deforming force is called restoring force.

Question 4

Young’s modulus

Answer 4

It is the ratio of normal stress to longitudanal strain.

Question 5

Bulk modulus

Answer 5

It is the ratio of normal stress to volumetric strain

Question 6

Modulus of rigidity

Answer 6

ratio of tangential stress to shear strain.

Question 7

Elastic fatigue

Answer 7

The property often elastic body by virtue of its behavior becomes less elastic due to the repeated action of deforming force.

Question 8

Poisson’s ratio

Answer 8

when a deforming force is applied at the free end of a wire of length ‘l’ And radius ‘r’ When the length increases by dl the radius decreases by dr.

lateral strain by longitudanal strain.

Question 9

elastic potential energy

Answer 9

When a wire is stretched work is done Against the intermolecular forces. The work gets stored in the wire as elastic potential energy.

Question 10

F=

Answer 10

YAl/L

Question 11

W=

Answer 11

YA/L (l2/2)

1/2 x stress x strain x volume

Question 12

U=

Answer 12

1/2 x Y x strain^2

Question 13

define stress

Answer 13

It is the internal restoring force, per unit area of a deformed body.
restoring force/area

Question 14

Types of stress

Answer 14

1. Normal stress
2. Shearing stress
3. hydraulic stress
4. Tensile stress
5. Compressive stress