McqMate

77

47.7k

1. |
## A scalar quantity has __________. |

A. | magnitude |

B. | direction |

C. | both (a) and (b) |

D. | none of these |

Answer» A. magnitude |

2. |
## Which of the following is/are scalar quantity(s)? |

A. | distance |

B. | density |

C. | temperature |

D. | all of these |

Answer» D. all of these |

3. |
## Which of the following is not a scalar quantity? |

A. | entropy |

B. | displacement |

C. | volume |

D. | mas |

Answer» B. displacement |

4. |
## A vector quantity has __________. |

A. | magnitude |

B. | direction |

C. | both (a) and (b) |

D. | none of these |

Answer» C. both (a) and (b) |

5. |
## Which of the following is/are vector quantity(s)? |

A. | force |

B. | electric field intensity |

C. | acceleration |

D. | all of these |

Answer» D. all of these |

6. |
## A unit vector has its magnitude as ____________. |

A. | 0 |

B. | 1 |

C. | ∞ |

D. | none of these |

Answer» B. 1 |

7. |
## A unit vector has _______ direction to that of the main vector. |

A. | same |

B. | opposite |

C. | normal upwards |

D. | normal downwards |

Answer» A. same |

8. |
## A vector P in Cartesian coordinates is represented by ____________. |

A. | (Px, Pφ, Pz) |

B. | (Px, Py, Pz) |

C. | (Px, Pφ, Pθ) |

D. | none of these |

Answer» B. (Px, Py, Pz) |

9. |
## ________ of two vectors uses the Law of Parallelogram. |

A. | multiplication |

B. | division |

C. | addition |

D. | all of these |

Answer» C. addition |

10. |
## Multiplication of two vectors is __________. |

A. | vector |

B. | scalar |

C. | either vector or scalar |

D. | cannot say |

Answer» C. either vector or scalar |

11. |
## If two vectors are orthogonal, then their scalar product is __________. |

A. | 1 |

B. | 0 |

C. | ∞ |

D. | 100 |

Answer» B. 0 |

12. |
## ___________ product is governed by the Right-Hand Screw Rule. |

A. | vector |

B. | scalar |

C. | simple mathematical |

D. | none of these |

Answer» A. vector |

13. |
## The vector product obeys the __________ law. |

A. | Commutative |

B. | Associative |

C. | Distributive |

D. | Parallelogram |

Answer» C. Distributive |

14. |
## The cross product of the same vector to itself is ____________. |

A. | 0 |

B. | 1 |

C. | ∞ |

D. | 100 |

Answer» A. 0 |

15. |
## ____________ product of two unit vectors is the third unit vector. |

A. | vector |

B. | scalar |

C. | both (a) and (b) |

D. | none of these |

Answer» A. vector |

16. |
## 'r' in Cylindrical coordinates corresponding to Cartesian coordinate (3, 4, 5) is ____________. |

A. | 12 |

B. | 7 |

C. | 10 |

D. | 5 |

Answer» D. 5 |

17. |
## In a Cartesian coordinate system, axes x, y and z are at __________ to each other. |

A. | 45° |

B. | 90° |

C. | 120° |

D. | 180° |

Answer» B. 90° |

18. |
## Cartesian coordinates are represented in terms of ___________. |

A. | (r, φ, z) |

B. | (r, θ, φ) |

C. | (x, y, z) |

D. | all of these |

Answer» C. (x, y, z) |

19. |
## Cylindrical coordinates are represented in terms of ____________. |

A. | (r, φ, z) |

B. | (r, θ, φ) |

C. | (x, y, z) |

D. | all of these |

Answer» A. (r, φ, z) |

20. |
## Spherical coordinates are represented in terms of ___________. |

A. | (r, φ, z) |

B. | (r, θ, φ) |

C. | (x, y, z) |

D. | all of these |

Answer» B. (r, θ, φ) |

21. |
## In Cylindrical coordinate systems, unit vector ar is __________. |

A. | directed outwards radially |

B. | normal to cylindrical surface at a point |

C. | both (a) and (b) |

D. | none of these |

Answer» C. both (a) and (b) |

22. |
## Cylindrical coordinate 'r' is related to the Cartesian coordinate as __________. |

A. | (x, y) |

B. | (x + y) |

C. | (x2/y2) |

D. | (x2 + y2)1/2 |

Answer» D. (x2 + y2)1/2 |

23. |
## Cylindrical coordinate 'z' is related to the Cartesian coordinate as __________. |

A. | tan−1(y/x) |

B. | z |

C. | xy/z |

D. | cot z |

Answer» B. z |

24. |
## In a Spherical coordinate system, φ is ____________. |

A. | angle of elevation |

B. | azimuthal angle |

C. | distant from the origin to the point |

D. | all of these |

Answer» B. azimuthal angle |

25. |
## Spherical coordinate system is a _________. |

A. | right-handed syste. |

B. | left-handed system |

C. | both (a)and (b) |

D. | none of these |

Answer» A. right-handed syste. |

26. |
## In a Spherical coordinate system, φ is given as _________. |

A. | y/x |

B. | x/y |

C. | tan−1(y/x) |

D. | tan−1(x/y) |

Answer» C. tan−1(y/x) |

27. |
## In a Spherical coordinate system, r is given as ___________. |

A. | (x + y + z) |

B. | (x2 + y2 + z2) |

C. | (x2 + y2 + z2)1/2 |

D. | none |

Answer» C. (x2 + y2 + z2)1/2 |

28. |
## For transformation from the Cartesian coordinate system to Spherical coordinate system, ap should be equal to ____________. |

A. | cos θ |

B. | − cos θ |

C. | sin θ |

D. | − sin θ |

Answer» A. cos θ |

29. |
## In terms of Spherical coordinate system variables, y of Cartesian coordinate system is given as __________. |

A. | r sin θ cos φ |

B. | r sin θ sin φ |

C. | r cos θ sin φ |

D. | r cos θ cos φ |

Answer» B. r sin θ sin φ |

30. |
## In the Cylindrical coordinate system, z ranges between____________. |

A. | 0 and 1 |

B. | −∞ and 0 |

C. | 0 and −∞ |

D. | −∞ and ∞ |

Answer» D. −∞ and ∞ |

31. |
## In the Cylindrical coordinate system, φ ranges from _____________. |

A. | 0 to less than π |

B. | 0 to less than 2π |

C. | 0 to less than 3π |

D. | 0 to less than 4π |

Answer» B. 0 to less than 2π |

32. |
## Line integral involves _________ product. |

A. | scalar |

B. | vector |

C. | both (a) an (b) |

D. | none of these |

Answer» A. scalar |

33. |
## Del operator is ______________. |

A. | same as the gradient operator |

B. | vector differential operator |

C. | both (a) an (b) |

D. | none of these |

Answer» C. both (a) an (b) |

34. |
## Gradient represents the __________ of maximum space rate of increase of a scalar field. |

A. | magnitude |

B. | direction |

C. | both (a) an (b) |

D. | none of these |

Answer» C. both (a) an (b) |

35. |
## (AB) is equal to ___________. |

A. | A. B |

B. | A + B |

C. | 2AB |

D. | B A + A B |

Answer» D. B A + A B |

36. |
## An is equal to _____________. |

A. | n A |

B. | nAn−1 A |

C. | nAn A |

D. | nA |

Answer» B. nAn−1 A |

37. |
## Divergence of a vector at a point in a vector field is __________ quantity. |

A. | vector |

B. | scalar |

C. | both (a) an (b) |

D. | none of these |

Answer» B. scalar |

38. |
## Divergence of vector field is net outward flux of a vector per unit ______. |

A. | surface area |

B. | volume |

C. | length |

D. | none of these |

Answer» B. volume |

39. |
## Divergence at a point is positive if field lines are _________ |

A. | diverging |

B. | converging |

C. | both (a) an (b) |

D. | none of these |

Answer» A. diverging |

40. |
## If the rate at which field lines enter into a small volume and also leave, then divergence is ________. |

A. | ∞ |

B. | 1 |

C. | 0 |

D. | −1 |

Answer» C. 0 |

41. |
## Divergence Theorem is applicable for a ________ that is bounded by a _________. |

A. | volume, surface |

B. | surface, volume |

C. | surface, line |

D. | line, surface |

Answer» A. volume, surface |

42. |
## Divergence Theorem relates ________ integral to __________ integral. |

A. | surface, volume |

B. | line, surface |

C. | volume, line |

D. | all of these |

Answer» A. surface, volume |

43. |
## Curl measures _________. |

A. | rate of change of vector |

B. | circular rotation |

C. | both (a) and (b) |

D. | none of these |

Answer» C. both (a) and (b) |

44. |
## Stoke's Theorem relates, ______ integral to a _______ integral. |

A. | volume, surface |

B. | volume, line |

C. | line, surface |

D. | all of these |

Answer» C. line, surface |

45. |
## Laplacian operator ________. |

A. | is a scalar function |

B. | is a vector function |

C. | can be a scalar or vector function |

D. | none of these |

Answer» C. can be a scalar or vector function |

46. |
## Laplacian of a scalar is __________. |

A. | scalar |

B. | vector |

C. | both (a) and (b) |

D. | none of these |

Answer» A. scalar |

47. |
## Laplacian of a vector is ___________ of gradient of its divergence and its curl of curl. |

A. | addition |

B. | difference |

C. | multiplication |

D. | division |

Answer» B. difference |

48. |
## A scalar field is harmonic in a given region, if its Laplacian is __________. |

A. | ∞ |

B. | −1 |

C. | 1 |

D. | 0 |

Answer» D. 0 |

49. |
## Metals have their conductivity "σ" _________. |

A. | >>1 |

B. | <<1 |

C. | 0 |

D. | none of these |

Answer» A. >>1 |

50. |
## Insulators have their conductivity "σ" _________. |

A. | >>1 |

B. | <<1 |

C. | 0 |

D. | none of these |

Answer» B. <<1 |

51. |
## Electrostatic field is _________ a perfect conductor. |

A. | same inside |

B. | infinite inside |

C. | zero inside |

D. | none of these |

Answer» C. zero inside |

52. |
## Potential is _________ a perfect conductor. |

A. | same inside |

B. | infinite inside |

C. | zero inside |

D. | none of these |

Answer» A. same inside |

53. |
## As per Gauss' Law, charge density inside a perfect conductor is zero if E is _________. |

A. | positive |

B. | negative |

C. | unity |

D. | zero |

Answer» D. zero |

54. |
## Conductivity of dielectric is _________. |

A. | low |

B. | high |

C. | both (a) and (b) |

D. | cannot say |

Answer» A. low |

55. |
## Which of the following is not a non-polar dielectric? |

A. | water |

B. | oxygen |

C. | CO2 |

D. | alcohol |

Answer» B. oxygen |

56. |
## The direction of electric dipole moment is _________ applied electric field. |

A. | orthogonal |

B. | contrary |

C. | same |

D. | none of these |

Answer» C. same |

57. |
## Electric polarization of a material is electric dipole moment per unit _________. |

A. | length |

B. | area |

C. | volume |

D. | none of these |

Answer» B. area |

58. |
## Capacitor stores energy in _________ field. |

A. | electric |

B. | magnetic |

C. | gravity |

D. | none of these |

Answer» A. electric |

59. |
## Inductor stores energy in ________ field. |

A. | electric |

B. | magnetic |

C. | gravity |

D. | none of these |

Answer» B. magnetic |

60. |
## Which of the following is not an inductor? |

A. | toroid |

B. | transmission line |

C. | solenoid |

D. | none of these |

Answer» D. none of these |

61. |
## Magnetic field at any point inside a long solenoid is _________. |

A. | zero |

B. | infinity |

C. | constant |

D. | none of these |

Answer» C. constant |

62. |
## A toroid is _________ solenoid. |

A. | a long |

B. | a small |

C. | not a |

D. | none of these |

Answer» A. a long |

63. |
## For a medium to be a quasi-conductor, the dissipation factor should be _________. |

A. | infinity |

B. | zero |

C. | unity |

D. | none of these |

Answer» C. unity |

64. |
## Loss tangent is the same as _________. |

A. | mutual inductance |

B. | resistivity |

C. | conductivity |

D. | dissipation factor |

Answer» D. dissipation factor |

65. |
## Loss tangent is given as _________. |

A. | σ/ωε |

B. | ω/σε |

C. | ωε/σ |

D. | σε/ω |

Answer» A. σ/ωε |

66. |
## Loss tangent approximates _________. |

A. | attenuation constant |

B. | phase constant |

C. | intrinsic impedance |

D. | all of these |

Answer» D. all of these |

67. |
## The combined effect of electric dipoles is seen in _________. |

A. | polarization |

B. | magnetization |

C. | both (a) and (b) |

D. | none of these |

Answer» A. polarization |

68. |
## The combined effect of magnetic dipoles is seen in _________. |

A. | polarization |

B. | magnetization |

C. | both (a) and (b) |

D. | none of these |

Answer» B. magnetization |

69. |
## Permeability of vacuum is given as _________. |

A. | 4 × 10−7 H/m |

B. | 14 × 10−7 H/m |

C. | 4 × 10−9 H/m |

D. | 14 × 10−9 H/m |

Answer» A. 4 × 10−7 H/m |

70. |
## Magnetic susceptibility is _________. |

A. | unitless |

B. | dimensionless |

C. | both (a) and (b) |

D. | none of these |

Answer» B. dimensionless |

71. |
## Dipole moment is _________ a right-hand screw, when it is moved in the current's direction in a current loop. |

A. | orthogonal to the direction of |

B. | opposite to the direction of |

C. | in the direction of |

D. | none of these |

Answer» C. in the direction of |

72. |
## On the basis of magnetic behaviour, materials are classified into _________ categories. |

A. | 2 |

B. | 3 |

C. | 4 |

D. | 5 |

Answer» D. 5 |

73. |
## Maxwell's equations involve_______. |

A. | Charge density |

B. | Current density |

C. | Magnetic intensity |

D. | All of these |

Answer» D. All of these |

74. |
## ε0 is ________ F/m. |

A. | 8.854 × 10−12 |

B. | 6.654 × 10−12 |

C. | 8.854 × 10−10 |

D. | 6.654 × 10−10 |

Answer» A. 8.854 × 10−12 |

75. |
## Electric dipole is a pair of __________ and __________ point charges. |

A. | Equal and same |

B. | Unequal and same |

C. | Equal and opposite |

D. | Unequal and opposite |

Answer» C. Equal and opposite |

76. |
## Electric flux density________medium. |

A. | Depends on |

B. | Independent of |

C. | Both (a) and (b) |

D. | None of these |

Answer» B. Independent of |

77. |
## If work done Wmn is zero, then VN and VM are related as _______. |

A. | VN + VM = 0 |

B. | VN − VM = 0 |

C. | 2VN + VM = 0 |

D. | VN + 2VM = 0 |

Answer» B. VN − VM = 0 |

78. |
## Charge distribution symmetry can be of _______ type. |

A. | Spherical |

B. | Cylindrical |

C. | Planar |

D. | All of these |

Answer» D. All of these |

79. |
## Curl of electrostatic field is __________. |

A. | ∞ |

B. | 1 |

C. | 0 |

D. | None of these |

Answer» C. 0 |

80. |
## As per Stoke's Theorem, = _________. |

A. | ∞ |

B. | 1 |

C. | 0 |

D. | None of these |

Answer» C. 0 |

81. |
## Potential energy _____ if a test charge is moved from a lower potential point to a higher potential point. |

A. | Remains the same |

B. | Increases |

C. | Decreases |

D. | Becomes zero |

Answer» B. Increases |

82. |
## In the case of a linear material medium, _________ equation can be derived easily from Gauss' law. |

A. | Poisson |

B. | Laplace |

C. | Both (a) and (b) |

D. | None of these |

Answer» C. Both (a) and (b) |

83. |
## According to the method of images, the tangential component of electric field to conductor surface is __________. |

A. | Unity |

B. | Zero |

C. | Infinity |

D. | None of these |

Answer» B. Zero |

84. |
## Steady magnetic fields are governed by __________ law. |

A. | Biot–Savart's |

B. | Ampere's Circuital |

C. | Both (a) and (b) |

D. | None of these |

Answer» C. Both (a) and (b) |

85. |
## There will be force of attraction between two current-carrying conductors if the currents are in __________ direction. |

A. | Same |

B. | Opposite |

C. | None of these |

D. | Cannot say |

Answer» A. Same |

86. |
## Lorentz force equation comprises __________ and __________ forces. |

A. | Electric, magnetic |

B. | Mechanical, chemical |

C. | Both (a) and (b) |

D. | None of these |

Answer» A. Electric, magnetic |

87. |
## Magnetic dipole moment is a product of __________. |

A. | Current and area |

B. | Area and its direction |

C. | Current, area and its direction |

D. | None of these |

Answer» C. Current, area and its direction |

88. |
## According to Faraday's __________ Law, as long as changes happen in magnetic flux, induced emf persists. |

A. | First |

B. | Second |

C. | Third |

D. | Fourth |

Answer» A. First |

89. |
## According to __________ Law, induced current acts to produce an opposing flux. |

A. | Bio–Savart's |

B. | Lenz's |

C. | Ampere's |

D. | Faraday's |

Answer» B. Lenz's |

90. |
## Biot–Savart's Law can be applied to __________ length current- carrying conductors. |

A. | Large |

B. | Medium |

C. | Small |

D. | Very small |

Answer» D. Very small |

91. |
## Ampere's Circuital Law is analogous to __________ Law in electrostatics. |

A. | Lenz's |

B. | Gauss's |

C. | Biot–Savart's |

D. | Faraday's |

Answer» B. Gauss's |

92. |
## Ampere's Circuital Law can be applied __________ the conductor. |

A. | Inside |

B. | Outside |

C. | Both (a) and (b) |

D. | None of these |

Answer» C. Both (a) and (b) |

93. |
## Magnetic flux density is the same as __________. |

A. | Magnetic induction |

B. | Magnetic field strength |

C. | Both (a) and (b) |

D. | None of these |

Answer» C. Both (a) and (b) |

94. |
## Total flux passing through a closed surface held in a magnetic field is __________. |

A. | Infinity |

B. | Zero |

C. | Unity |

D. | None of these |

Answer» B. Zero |

95. |
## __________ gradient of magnetic scalar potential gives magnetic field intensity. |

A. | Positive |

B. | Negative |

C. | Double |

D. | Integral |

Answer» B. Negative |

96. |
## Magnetization volume current density in magnetic materials is due to __________. |

A. | Applied non-uniform magnetic field |

B. | Non-uniform magnetic susceptibility of material |

C. | Both (a) and (b) |

D. | None of these |

Answer» C. Both (a) and (b) |

97. |
## Maxwell's equations shelter on __________ law(s). |

A. | Faraday's |

B. | Gauss's |

C. | Ampere's |

D. | All of these |

Answer» D. All of these |

98. |
## Conduction current through a wire is __________ displacement current in capacitor. |

A. | Same as |

B. | Different from |

C. | Twice of |

D. | None of these |

Answer» A. Same as |

99. |
## In empty space, conduction current is __________. |

A. | Infinity |

B. | Unity |

C. | Zero |

D. | None of these |

Answer» C. Zero |

100. |
## Emf is closed __________ integral of non-conservational electric field that is generated by battery. |

A. | Line |

B. | Surface |

C. | Volume |

D. | None of these |

Answer» A. Line |

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