

McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering , Electronics and Communication Engineering .
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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