general properties of matter book mcq

GENERAL

PROPERTIES OF

MATTER

NOTE

ASSIGNMENT

MCQ

Learning Point

1. Instructionsions
2. Elasticity
   1. 1 Force
   2. 2 Reson Of Elasticity
   3. 3 Plastic Body
3. Stress
   1. 1 Type Of Stress
4. Strain
   Type Of Strain
5. Modulusulus Of Elasticity
   1. 1 Type Of Modulus Of Elasticity
6. Hook's Law
7. surface Tension
8. Laplases Molecular Theory

Instructions

Molecular Structure Of Materials

Atom = Nucleus + Atoms
"An atom is made of a nucleus and atoms"
Matter = molecules + atoms
"Matter is Made of molecules and atoms"
nucleons = positive charged protons and neutrons

Force in atoms

Nuclear force = operating between different nucleons are responsible for structure for the structure of nucleus.

Electromagnetic Force = operate between pair of electrons and between an electron and the nucleus

2.Elasticity

Elasticity:-elasticity is the property of the object by virtue of which it regain it's original configuration after removal of the deforming force
for example spring, when we apply deforming force Spring change it's configuration (change in length) and when we remove deforming force it's regain its original configuration.


2.1 Forces

1. deforming force
2. restoring force

deforming force:-

A force which produces a change in configuration of the object on applying it is called a deforming force.

restoring force:-

A force that acts to return a perturbed system to equilibrium or to restore a deformed body to its original form

perfectly Elastic body :-

those bodies which regains it's original configuration immediately and completely after removal of deforming force are called perfectly elastic body

reason of elasticity

solid body is made of molecules or atoms. molecules it means many molecules in solid , each molecules is acted upon by the force due to the neighbouring molecule.
if deforming force more then between two molecule forces.then the atom will move away from each other. and body act as an elastic body

perfectly plastic body

those bodies which does not regain it's configuration at all an the removal of deforming force are call perfectly plastic body

3.Stress

stress:-

restoring force acting per unit area of cross-section of the deforming body is called stress

stress =
deforming force/ unit area

s = F/A
dimension M⁻¹l⁻ T⁻²

type of stress

1. Normal stress :- when deforming force act over an area of body then the internal restoring force set up per area of body


2. tensile stress :- if there is an increase length of the body is direction of applied force is called tensile stress


3. compressive stress :- if there is decrease in length of wire or compression of body its called comprehensive stress


4. tangential or shearing stress :- when deforming force act tangential to surface of body

strain

strain :-

the ratio of chnage in configuration to original configuration of bosy or substance

strain =
change in configuration / original configuration

type of starin

1. ligitudinal strain :- if deforming force produce in chnage in length alon strain
   
   logitudinal strain =
   chnage in length / original length
   
   ϵₗ = ∆l/l




2. volume strain :- a change in volume alone strain produce called vaolume strain
   
   volume strain =
   change in volume/ original volume
   ϵᵥ =∆v/v



3. shearing strain :- if deforming force produce shape without chnage in volume it's called shearing strain
   
   ϵₛ= x/h
   tanθ = x/h

click on this black colour buttons wht you want download.

इस काले रंग के बटन पर क्लिक करें जिसे आप डाउनलोड करना चाहते हैं।