JEE Questions for Physics Mechanical Properties Of Solids Quiz 6 - MCQExams.com

When a pressure of 100 atmosphere applied on a spherical ball, then its volume reduces to 0.01%. The bulk modulus of the material of the rubber in dyne/cm2 is
  • 10 × 1012
  • 100 × 1012
  • 1 × 1012
  • 20 × 1012
The isothermal bulk modulus of a gas at atmospheric pressure is
  • 1 mm of Hg
  • 13.6 mm of Hg
  • 1.013 × 105 N/m2
  • 2.026 × 105 N/m2
The bulk modulus of an ideal gas at constant temperature
  • Is equal to its volume V
  • Is equal to p/2
  • Is equal to its pressure p
  • Cannot be determined
Which of the following relations is true ?

  • Physics-Mechanical Properties of Solids-79860.png
  • 2)
    Physics-Mechanical Properties of Solids-79861.png

  • Physics-Mechanical Properties of Solids-79862.png

  • Physics-Mechanical Properties of Solids-79863.png
The value of Poisson\'s ratio lies between
  • –1 to 1/2
  • –3/4 to –1/2
  • –1/2 to 1
  • 1 to 2
If the Young\'s modulus of the material is 3 times its modulus of rigidity, then its volume elasticity will be
  • Zero
  • Infinity
  • 2 × 1010 N/m2
  • 3 × 1010 N/m2
The lower surface of a cube is fixed. On its upper surface, force is applied at an angle of 30° from its surface. The change will be of the type
  • Shape
  • Size
  • None
  • Shape and size
The upper end of a wire of radius 4 mm and length 100 cm is clamped and its other end is twisted through an angle of 30°. Then angle of shear is
  • 12°
  • 0.12°
  • 1.2°
  • 0.012°
The graph shown was obtained from experimental measurements of the period of oscillations T for different masses M placed in the scale pan on the lower end of the spring balance. The most likely reason for the line not passing through the origin is that the
Physics-Mechanical Properties of Solids-79868.png
  • Spring did not obey Hooke's Law
  • Amplitude of the oscillations was too large
  • Clock used needed regulating
  • Mass of the pan was neglected
A graph is shown between stress and strain for a metal. The part in which Hooke\'s law holds good is
Physics-Mechanical Properties of Solids-79870.png
  • OA
  • AB
  • BC
  • CD
The strain-stress curves of three wires of different materials are shown in the figure. P, Q and R are the elastic limits of the wires. The figure shows that
Physics-Mechanical Properties of Solids-79871.png
  • Elasticity of wire P is maximum
  • Elasticity of wire Q is maximum
  • Tensile strength of R is maximum
  • None of the above is true
The adjacent graph shows the extension (∆l) of a wire of length lm suspended from the top of a roof at one end with a load W connected to the other end. If the cross sectional area of the wire is 10–6 m2, calculate the young\'s modulus of the material of the wire
Physics-Mechanical Properties of Solids-79873.png
  • 2 × 1011 N/m2
  • 2 × 10–11 N/m2
  • 3 × 10–12 N/m2
  • 2 × 10–13 N/m2
The graph is drawn between the applied force F and the strain (x) for a thin uniform wire. The wire behaves as a liquid in the part
Physics-Mechanical Properties of Solids-79875.png
  • ab
  • bc
  • cd
  • oa
The value of force constant between the applied elastic force F and displacement will be
Physics-Mechanical Properties of Solids-79876.png

  • Physics-Mechanical Properties of Solids-79877.png
  • 2)
    Physics-Mechanical Properties of Solids-79878.png

  • Physics-Mechanical Properties of Solids-79879.png

  • Physics-Mechanical Properties of Solids-79880.png
The diagram shown stress v/s strain curve for the materials A and B. From the curves we infer that
Physics-Mechanical Properties of Solids-79882.png
  • A is brittle but B is ductile
  • A is ductile and B is brittle
  • Both A and B are ductile
  • Both A and B are brittle
Which one of the following is the Young\'s modulus (in N/m2) for the wire having the stress-strain curve shown in the figure
Physics-Mechanical Properties of Solids-79883.png
  • 24 × 1011
  • 8.0 × 1011
  • 10 × 1011
  • 2.0 × 1011
The points of maximum and minimum attraction in the curve between potential energy (U) and distance (r) of a diatomic molecules are respectively
Physics-Mechanical Properties of Solids-79885.png
  • S and R
  • T and S
  • R and S
  • S and T
Two wires are made of the same material and have the same volume. However wire 1 has cross–sectional area A and wire 2 has cross–sectional area 3A. If the length of wire 1 increases by Δx on applying force F, how much force is needed to stretch wire 2 by the same amount?
  • F
  • 4F
  • 6F
  • 9F
The increase in length is l of a wire of length L by the longitudinal stress. Then, the stress is proportional to
  • L/l
  • l/L
  • l x L
  • l2 x L
The dimensions of four wires of the same material are given below. In which wire the increase in length will be maximum when the same tension is applied
  • Length 100 cm, Diameter 1 mm
  • Length 200 cm, Diameter 2 mm
  • Length 300 cm, Diameter 3 mm
  • Length 50 cm, Diameter 0.5 mm
Which is the most elastic?
  • Iron
  • Copper
  • Quartz
  • Wood
The Young\'s modulus of a wire of length L and radius r is Y N/m2. If the length and radius are reduced to L/2 and r/2, then its Young\'s modulus will be
  • Y/2
  • Y
  • 2Y
  • 4Y
Young\'s modulus of rubber is 104 N/m2 and area of cross-section is 2 cm2. If force of 2 × 105 dynes is applied along its length, then its initial length L becomes
  • 3L
  • 4L
  • 2L
  • None of these
A copper wire of length 4.0 m and area of cross-section 1.2 cm2 is stretched with a force of 4.8 × 102 N. If Young\'s modulus for copper is 1.2 × 1011 N/m2, the increase in the length of the wire will be
  • 1.33 mm
  • 1.33 mm
  • 2.66 mm
  • 2.66 mm
A wooden wheel of radius R is made of two semicircular parts (see figure). The two parts are held together by a ring made of a metal strip of cross sectional area S and length L. L is slightly less than 2πR. To fit the ring on the wheel, it is heated so that its temperature rises by ΔT and it just steps over the wheel. As it cools down to surrounding temperature, it presses the semicircular parts together. If the coefficient of linear expansion of the metal is a, and its Young\'s modulus is Y, the force that one part of the wheel applies on the other part is
Physics-Mechanical Properties of Solids-79890.png

  • Physics-Mechanical Properties of Solids-79891.png
  • 2)
    Physics-Mechanical Properties of Solids-79892.png

  • Physics-Mechanical Properties of Solids-79893.png

  • Physics-Mechanical Properties of Solids-79894.png
Hooke\'s law defines
  • Stress
  • Strain
  • Modulus of elasticity
  • Elastic limit
A wire is loaded by 6 kg at its one end, the increase in length is 12 mm. If the radius of the wire is doubled and all other magnitudes are unchanged, then increase in length will be
  • 6 mm
  • 3 mm
  • 24 mm
  • 48 mm
On increasing the length by 0.5 mm in a steel wire of length 2 m and area of cross-section 2 mm2, the force required is [Y for steel = 2.2 × 1011 N/m2]
  • 1.1 × 105 N
  • 1.1 × 104 N
  • 1.1 × 103 N
  • 1.1 × 102 N
A stress of 3.18 × 108 Nm–2 is applied to a steel rod of length 1 m along its length. Its Young\'s modulus is 2 × 1011 Nm–2. Then, the elongation produced in the rod in mm is
  • 3.18
  • 6.36
  • 5.18
  • 1.59
The material which practically does not show elastic after effect is
  • Copper
  • Rubber
  • Steel
  • Quartz
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Physics Quiz Questions and Answers