MCQOPTIONS
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MCQOPTIONS
This section includes 152 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Questions knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The number of electrons in one coulomb charge is equal to_______________? |
| A. | 6.2 x 1018 |
| B. | 1.6 x 1019 |
| C. | 6.2 x 1021 |
| D. | 1.6 x 10-27 |
| Answer» B. 1.6 x 1019 | |
| 52. |
The minimum value of potential gradient in a cable occurs in____________? |
| A. | insulation |
| B. | conductor |
| C. | outer sheath |
| D. | uniformly all over |
| Answer» B. conductor | |
| 53. |
The minimum charge on any object cannot be less than_______________? |
| A. | 1.6 x 10-19C |
| B. | 3.2 x 10-19C |
| C. | 9.1 x 109C |
| D. | no definite value exist |
| Answer» B. 3.2 x 10-19C | |
| 54. |
The metallic spheres A and B of radii 2m and 4m respectively carry the same charge 4 x 10 8C. If the spheres are connected by a copper wire_______________? |
| A. | charge will flow from A to B |
| B. | charge will flow from B to A |
| C. | no flow of charge will occur |
| D. | both a and b are possible |
| Answer» B. charge will flow from B to A | |
| 55. |
The lines of force due to charged particles are_________? |
| A. | always straight |
| B. | always curved |
| C. | sometimes curved |
| D. | none of the above |
| Answer» C. sometimes curved | |
| 56. |
The inverse of capacitance is called_______________? |
| A. | reluctance |
| B. | conductance |
| C. | susceptance |
| D. | elastance |
| Answer» E. | |
| 57. |
The force per unit charge is know as__________________? |
| A. | electric flux |
| B. | electric intensity |
| C. | electric potential |
| D. | all of above are same |
| Answer» C. electric potential | |
| 58. |
The force between two charges is 120 N. If the distance between the charges is doubled, the force will be________________? |
| A. | 60 N |
| B. | 30 N |
| C. | 40 N |
| D. | 15 N |
| Answer» C. 40 N | |
| 59. |
The electrostatic force between two charges of one coulomb each and placed at a distance of 0.5 m will be____________? |
| A. | 36 x 10fa |
| B. | 36 x 107 N |
| C. | 36 x 108 N |
| D. | 36 x 109 N |
| Answer» E. | |
| 60. |
The electric lines of force are____________? |
| A. | imaginary |
| B. | physically existing every where |
| C. | physically existing near the charges |
| D. | depends upon case |
| Answer» B. physically existing every where | |
| 61. |
The electric field at a point situated at a distance d from straight charged conductor is____________? |
| A. | proportional to d |
| B. | inversely proportional to d |
| C. | inversely proportional to d |
| D. | none of the above |
| Answer» C. inversely proportional to d | |
| 62. |
The electric field intensity at a point situated 4 meters from a point charge is 200 N/C. If the distance is reduced to 2 meters, the field intensity will be______________? |
| A. | 400 N/C |
| B. | 600 N/C |
| C. | 800 N/C |
| D. | 1200 N/C |
| Answer» D. 1200 N/C | |
| 63. |
The electric charge of 100 °C is 13cm apart from another charge 16.9°C electric force between them is_____________? |
| A. | 9x107N |
| B. | 900N |
| C. | 9x105N |
| D. | 9x106N |
| Answer» C. 9x105N | |
| 64. |
The dissipation factor of a good dielectric is of the order of____________? |
| A. | 0.0002 |
| B. | 0.002 |
| C. | 0.02 |
| D. | 0.2 |
| Answer» B. 0.002 | |
| 65. |
The direction of electric field due +0 positive charge is ___________? |
| A. | away from the charge |
| B. | towards the charge |
| C. | both A. and (b) |
| D. | none of the above |
| Answer» B. towards the charge | |
| 66. |
The dielectric constant (relative permittivity) of glass is given by___________? |
| A. | 0.1 to 0.4 |
| B. | 0.5 to 1.0 |
| C. | 2.0 to 4.0 |
| D. | 5 to 100 |
| Answer» E. | |
| 67. |
The capacity of capacitor bank used in power factor correction is expressed in terms of____________? |
| A. | kW |
| B. | kVA |
| C. | kVAR |
| D. | volts |
| Answer» D. volts | |
| 68. |
The capacitor preferred for high frequency circuits is_____________? |
| A. | air capacitor |
| B. | mica capacitor |
| C. | electrolytic capacitor |
| D. | none of the above |
| Answer» C. electrolytic capacitor | |
| 69. |
The capacitance of a capacitor is not affected by____________? |
| A. | distance between plates |
| B. | area of plates |
| C. | thickness of plates |
| D. | all of the above |
| Answer» D. all of the above | |
| 70. |
The capacitance C is charged through a resistance R. The time constant of the charging circuit is given by__________? |
| A. | CIR |
| B. | 1/RC |
| C. | RC |
| D. | RIC |
| Answer» D. RIC | |
| 71. |
The capacitance between two plates increases with____________? |
| A. | shorter plate area and higher applied voltage |
| B. | shorter plate area and shorter distance between them |
| C. | larger plate area, longer distance between plates and higher,applied voltage |
| D. | larger plate area and shorter distance between plates |
| Answer» E. | |
| 72. |
The bridge used for the measurement of the value of the capacitance is____________? |
| A. | Wien’s bridge |
| B. | Wheatstone bridge |
| C. | Schering bridge |
| D. | Hay’s bridge |
| Answer» D. Hay’s bridge | |
| 73. |
The absolute permittivity of free space is given by_____________? |
| A. | 8.854 x 1(T9 F/m) |
| B. | 8.854 x 1(T10 F/m) |
| C. | 8.854 x KT11 F/m |
| D. | 8.854 x 10″12 F/m |
| Answer» C. 8.854 x KT11 F/m | |
| 74. |
Potential difference is the work done in moving unit positive charge form one point to another________________? |
| A. | in the direction of electric intensity |
| B. | against electric intensity |
| C. | in any direction |
| D. | in the direction of electric flux |
| Answer» C. in any direction | |
| 75. |
Photocopier and inject printer are dealt in________________? |
| A. | Electrostatics |
| B. | Charges in motion |
| C. | Capacitors |
| D. | Electric fields |
| Answer» B. Charges in motion | |
| 76. |
Permittivity is expressed in_____________? |
| A. | Farad/sq-m |
| B. | Farad/meter |
| C. | Weber/meter |
| D. | Weber/sq-m |
| Answer» C. Weber/meter | |
| 77. |
Paper condenser is___________? |
| A. | always polarised |
| B. | usually of fixed value |
| C. | electrolytic condenser |
| D. | a variable condenser |
| Answer» C. electrolytic condenser | |
| 78. |
Paper capacitors usually have a tolerance of___________? |
| A. | ± 5% |
| B. | ± 10% |
| C. | ± 15% |
| D. | ± 20% |
| Answer» C. ± 15% | |
| 79. |
Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ? |
| A. | Aluminium foil capacitor |
| B. | Mica capacitor |
| C. | Ceramic capacitor |
| D. | Paper capacitor |
| Answer» D. Paper capacitor | |
| 80. |
One volt is the same as___________? |
| A. | one joule/coulomb |
| B. | one coulomb/joule |
| C. | one coulomb |
| D. | one joule |
| Answer» B. one coulomb/joule | |
| 81. |
N/C =_____________? |
| A. | V/A |
| B. | J/V |
| C. | V/m |
| D. | A/m |
| Answer» D. A/m | |
| 82. |
Mica capacitors are characterized by all of the following except___________? |
| A. | stable operation |
| B. | accurate value |
| C. | low leakage reactance |
| D. | low losses |
| Answer» D. low losses | |
| 83. |
is that property of a capacitor which delays any change of voltage across it ? |
| A. | inductance |
| B. | Capacitance |
| C. | Potential gradient |
| D. | None of the above |
| Answer» C. Potential gradient | |
| 84. |
In the case of a lossy capacitor, its series equivalent resistance value will be_______________? |
| A. | small |
| B. | very small |
| C. | large |
| D. | zero |
| Answer» D. zero | |
| 85. |
In order to remove static electricity from machinery___________? |
| A. | construct insulated cabins |
| B. | insulate the machinery |
| C. | ground the framework |
| D. | humidify the surroundings |
| Answer» D. humidify the surroundings | |
| 86. |
In a non-uniform electric field a polar molecule will experience____________? |
| A. | Net torque |
| B. | Net force |
| C. | both series and parallel combinations |
| D. | zero |
| Answer» D. zero | |
| 87. |
In a charged capacitor the energy resides in________________? |
| A. | magnetic hield |
| B. | electric field |
| C. | nuclear field |
| D. | gravitational field |
| Answer» C. nuclear field | |
| 88. |
In a capacitor the electric charge is stored in____________? |
| A. | metal plates |
| B. | dielectric |
| C. | both (A) and (B) |
| D. | none of the above |
| Answer» C. both (A) and (B) | |
| 89. |
In a capacitor, the electric charge is stored in_________? |
| A. | metal plates |
| B. | dielectric |
| C. | dielectric as well as metal plates |
| D. | none of the above |
| Answer» C. dielectric as well as metal plates | |
| 90. |
In a capacitive circuit___________? |
| A. | a steady value of applied voltage causes discharge |
| B. | an increase in applied voltage makes a capacitor charge |
| C. | decrease in applied voltage makes a capacitor charge |
| D. | none of the above |
| Answer» C. decrease in applied voltage makes a capacitor charge | |
| 91. |
In a cable capacitor, voltage gradient is maximum at the surface of the______________? |
| A. | earth |
| B. | conduction |
| C. | sheath |
| D. | insulator |
| Answer» C. sheath | |
| 92. |
If two charges are increased by two times then force_____________? |
| A. | Decreases 9 times |
| B. | Increases 9 times |
| C. | Increases 4 times |
| D. | Decreases 4 times |
| Answer» D. Decreases 4 times | |
| 93. |
If three 10 uF capacitors are connected in parallel, the net cararitance is___________? |
| A. | 20 uF |
| B. | 30 uE |
| C. | 40 uF |
| D. | 50 uF |
| Answer» C. 40 uF | |
| 94. |
If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will__________? |
| A. | decrease |
| B. | increase |
| C. | remains unchanged |
| D. | become zero |
| Answer» C. remains unchanged | |
| 95. |
If the distance between the two point charges become half then force between them becomes______________? |
| A. | double |
| B. | half |
| C. | four times |
| D. | remains same |
| Answer» D. remains same | |
| 96. |
If mica sheet is placed between the plates of a capacitor the capacity_______________? |
| A. | increases |
| B. | decreases |
| C. | increases then decreases |
| D. | decreases then increases |
| Answer» B. decreases | |
| 97. |
If metallic conductor is charged negatively then its weight______________? |
| A. | Remains same |
| B. | First increases then decreases |
| C. | Decreases then increases |
| D. | Increases for a while |
| Answer» E. | |
| 98. |
If free space between the plates of a capacitor is replaced by a dielectric_____________? |
| A. | The potential difference remains constant capacittance and energy stored increases |
| B. | The potential difference remains constant capacittance decreases and energy increases |
| C. | The potential difference decreases but both capacitance and energy increase |
| D. | both potential difference and capacitance decrease but energy increases |
| Answer» D. both potential difference and capacitance decrease but energy increases | |
| 99. |
If an ohmmeter reading immediately goes practically to zero and stays there, capacitor is___________? |
| A. | charged |
| B. | short-circuited |
| C. | lossy |
| D. | satisfactory |
| Answer» C. lossy | |
| 100. |
If an electrons is allowed to move along the field in a non uniform electric field then it will follow__________________? |
| A. | Spiral path |
| B. | Straight line |
| C. | Curved path |
| D. | Circular path |
| Answer» C. Curved path | |