1. Which of following is not a crystalline solid?
A. Zirconia
B. NaCl
C. Zinc
D. Nylon
2. Which of following solid / solids don’t have a definite melting point:
A. Crystalline solids
B. Glassy solids
C. Polymeric solids
D. Both B and C
4. The most ordered crystal system is and most disordered is .
A. Cubic,Trigonal
B. Cubic, Rhombic
C. Cubic, Monoclinic
D. Cubic, Triclinic
5. The ability of a body to regain original shape is called:
A. Modulus of elasticity
B. Plasticity
C. Elasticity
D. Toughness
6. The stress has same units as that of:
A. Pressure
C. Energy density
B. Bulk modulus
D. All of these
9. The breaking stress depends on:
A. Material of wire
B. Areaof cross section of wire
C. Length of wire
D. Diameter of wire
11. Thebreaking force of a wire depends on:
A. Materialof wire
B. Areaof cross section of wire
C. Change is length of wire when stress is applied
D. Allof these
12. The ratio of tensile stress to volume stress has dimensions same as that of:
A. Area
B. Volume
C. Length
D. Refractive index
16. Modulus of elasticity of a wire depends on:
A. Material of wire
B. Temperature
C. Impurities added to wire
D. All of these
17. If the temperature of a copper wire is increased, its modulus of elasticity__________:
A. Increases
B. Decreases
C. Remains same
D. Becomes infinity
18. The ratio of compressive stress to compressive strain is called .
A. Young’sModulus
B. Bulk Modulus
C. Shear Modulus
D. Modulus of rigidity
19. The extension occurred in a wire depends on (For same applied force): A. Initiallength of wire
B. Areaof cross section of wire
C. Material of wire
D. Allof these
20. To cause greater extension a wire should be:
A. Thin and short
B. Thick and long
C. Thin and long
D. Thick and short
21. Young’sModulus is also named as:
A. Modulus of rigidity
B. Bulk modulus
C. Shear modulus
D. Tensilemodulus
22.The reciprocal of bulk modulus is called:
A. Stiffness
C. Toughness
B. Hardness
D. Compressibility
23. Shear modulus and Young’smodulus for water are:
A. Undefined
B. Zero
C. 2.2´109 N m-2
D. None of these
24.Modulus of rigidity is another name for:
A. Young’smodulus
B. Bulk modulus
C. Shear modulus
D. None of these
25. Modulus of elasticity for a perfect elastic/rigid body is:
A. Zero
B. Verylarge
C. Verysmall
D. Infinite
26. Which of following is more elastic?
A.Rubber
B. Glass
C. Steel
D. Lead
29. The area under stress-strain graph represents:
A. Energystored
B. Modulus of elasticity
C. Energy density
D. Workdone during deformation
30. The slope of graph between strain and stress taking strain on y-axis and stress on x-axis represent?
A. Elasticmodulus
B. Energy density
C. Tensilestress
D. Reciprocal of elastic modulus
31. Which of following is brittle substance?
A. High carbon steel
B. Wroughtiron
C. Lead
D. All of these
33. Referring to graph shown in Q.32, Hook’s law is obeyed from:
A. O to A
B. O to B
C. O to C
D. B to C
34.Referring to graph shown in Q.32, the elasticity region is from:
A. O to A
C. O to C
D. B to C
36. A stress of 200 x 105 Pa is applied on a 2 m long rod through a mass of 5000 kg. If the linear strain of the rod is 10-4, the Young’smodulus Y is:
A. 1.5 x 10-4 Pa
B. 1.5 x 104 Pa
C. 2 x 105 Pa
D. 200 x 109 Pa
37.A mercury volume of 1600 x 10-6 is subject to a pressure of 1.4 x 106 2.8 x 1010 Pa, then the decrease in Pa. If the bulk modulus of mercury is its volume is:
A. 8 x 10-8 m3
C. 1.4 x 106 m3
B. 8 x 108 m3
D. 2.8 x 10-10 m3
38. An iron cube of length 1 m is acted upon by a tangential force of 105 N due to which the upper face the cube is displaced by 0.02 cm w.r.tt he bottom face. Then the shearing stress of the cube will be:
A. 0.02 Pa
B. 105 Pa
C. 0.02 x 105 Pa
D. 3 x 105 Pa
39. Referring to data in Question 38, What will be the shearing strain:
A. 0.02
B. 105
C. 0.02 x 10-2
D. 2 x 105
40. A certain force increases the length of a wire by 1 mm which of the following is required to increase the length by 2 mm:
A. 2F
B. 4F
C. 8F
D. 16F
41. Steel has greater modulus of elasticity than rubber thus for larger strain in rubber it requires stress
A. Less as compared to steel
B. Larger as compared to steel
C. Equal as compared to steel
D. Veryhigh as compared to steel
42. There are two wires A and B of same material and same length while the diameter of wire B is 2 times the diameter of wire A. Thenratio of the extension produced in the wires by applying the same force will be
A. 1:1
B. 2:1
C. 3:1
D. None of these
43. Two wires of the same material and radius but having lengths in the ratio 1:2 are stretched with the same force. The ratio of the work done in the two cases will be:
A. 1:1
B. 1:2
C. 1:4
D. None of these
44. A wire whose Young’s modulus is 2×1011 N m-2 have length 1 m and cross sectional area 1 mm2 the work required to increase the length by 2 mm is:
A. 0.2 J
B. 0.4 J
C. 0.8 J
D. None of these
45. The energy stored in deformed
A. P.E
C. Electrical energy material is:
B. K.E
D. None of these
46. The electrical properties of solids are successfully explained by which is based on .
A. Conventionalfree electron theory,Bohr model
B. Classical theory,Rutherford model
C. Energy band theory,Rutherford model
D. Energy band theory, wave mechanical model
47.The electrical conductivities of semiconductors ranges from:
A. 107 to 109 (W m)-1
B. 10-20 to 10-10 (W m)-1
C. 10-6 to 10-2 (W m)-1
D. 10-6 to 10-4 (W m)-1
48. Which one is not similarity between conductors and semiconductors?
A. Both have partially fill conduction band
B. Both have partially fill valence band
C. Both can conduct current
D. Both become insulator at zero kelvin
49. The majority charge carriers in n-type substance are:
A. Electrons
B. Holes
C. Positive charges
D. All of these
50. The minority charge carriers in p-type substance are:
A. Electrons
C. Positive charges
B. Holes
D. All of these
51.The net charge on p-type substance is:
A. Positive
C. Neutral
B. Negative
D. None of these
52. In semiconductors the total current is because of:
A. Electrons only
C. Electrons and holes
B. Holes only
D. None of these
53. There are certain materials whose resistivity become zero a certain temperature called temperature.
A. At, curie
B. Below,curie
C. Above, critical
D. Below,critical
54. Which is the application of superconductors?
A. MRI
B. Computer chips
C. Small motors
D. All of these
55. Which one of these is a diamagnetic substance?
A. Water
C. Antimony
B. Copper
D. All of these
56. For the core of transformer, which material is used?
A. Steel
B. Copper
C. Soft iron
D. Alnico V
57. The main source of magnetism is:
A. Spin motion of electrons
B. Spin motion of nucleus
C. Orbital motion of electrons
D. Both A and C
58.Above iron behaves as substance.
A. 750 °C, diamagnetic
B. 1023 K, diamagnetic
C. 750 °C, paramagnetic
D. Both A and B
59. Property of domains to retain their alignment even though magnetizing current becomes zero, is called:
A. Retantivity
B. Coercivity
C. Saturation
D. Hysteresis
60. The phenomena is which magnetism lags behind the magnetizing current is called .
A. Saturation
C. Retantivity
B. Hysteresis
D. Coercivity
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