WorksheetsChapter 8 (C1 & C2) : Physics of Matter
Total questions: 25
Worksheet time: 25mins
Which property of
material is not due to
plastic deformation
Brittle
Ductile
Ability to bend
Ability to withstand
stress
Which point on the stress
strain curve occurs after
the proportionality limit?
Upper yield point
Lower yield point
Elastic limit
Ultimate pointmass
Young’s modulus is define as
Strain / stress
Stress / strain
Strain x stress
length / area
A wire is stretched when acted upon by a stress which causes a strain in the wire. The energy stored per unit volume is 21σϵ if
The stress is directly proportional
to the strain
The elastic limit is exceeded
The force applied is constant
The wire is vertical
Thermal conductivity, k
depends on
the triple point of the
material.
the type of material.
the boiling point of the
material.
the shape of the
material
With increase in
temperature, heat will
increase.
be constant.
decrease.
be doubled.
What is the value of
coefficient of area
expansion for a sphere?
Assume coefficient of
linear expansion is α.
2α
α
3α
α/2
What happened at point D?
The change in the internal structure of the material.
The force (stress) on the material is maximum and is known as the breaking force (stress).
This is the point where the material breaks or fractures.
Hooke’s law is applicable within
Elastic limit
Plastic limit
Fracture point
Ultimate strength
If you apply a force to deform a material then remove the force and the material returns to its original shape this is
elastic deformation
plastic deformation
inelastic deformation
unplastic deformation
A 2m wire extends by 4mm what is the strain?
0.5
2x10-3
2x10-6
0.005
At ‘yield point’ of a copper wire
the load hasn't exceeded the elastic limit yet; so, Hooke's law applies
the load has already exceeded the elastic limit and the material has become plastic
even the plastic stage has passed and the wire has snapped already
Like Brass and Bronze, Copper has no yield point
X- Glass, Y- Copper, Z- Rubber
X- Glass, Y- Rubber, Z- Copper
X- Rubber, Y- Copper, Z- Glass
X- Rubber, Y- Glass, Z- Copper
Which letter is pointing to where the material will break?
A
B
C
D
What happen to the planes of atoms during upper yield point?
Atom breaks
Atom stay intact
Planes of atoms starts sliding upon each other
None of the above
If the area through which heat is transferred is increased by a factor of 2, then the rate of heat transfer is increased by .................
a factor of 4
a factor of 1/2
a factor of 2
a factor of 1
Units for thermal conductivity is .....
J kg-1 K-1
J mol-1 K-1
W mol-1 K-1
W m-1 K-1
What is Thermal expansion?
The transfer of thermal energy between materials by the collisions of particles
Is a decrease in a materials size when temperature decreases
An increase in a materials size when temperature increases
Chicken fried rice
Thermal expansion of liquid depends on the expansion of the container that it fills. However, why does liquid overflow after heating?
because container does not expand
because coefficient of volume expansion for liquid is bigger than the container
because liquid and container expand at the same amount
because particles in solid container is more closely packed together than liquid
Between two line, which has higher thermal conductivity?
Blue
Green
Both has the same thermal conductivity
none
What can we infer from the graph of temperature against length shown?
The metal bar is non - insulated
The metal bar is insulated
Not enough information given
The metal bar is made up of 2 different material
Heat has the same unit as
Tempreature
Work
Energy/time
Heat capacity
The area under force - elongation graph represents
Strain energy
Young modulus
Stress
Energy per unit volume
When an object is under stress,
It deforms
It undergoes strain
It change its shape/size
All of the answer
