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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