McqMate
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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