MCQOPTIONS
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MCQOPTIONS
This section includes 135 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Force in a conductor is __________ to the square of the distance between the charges. |
| A. | Directly proportional |
| B. | Inversely proportional |
| C. | Not related |
| D. | Cannot be determined |
| Answer» C. Not related | |
| 52. |
If a coil is wound around a steel core and electric current is passed through the coil, the steel core acts as a? |
| A. | Electromagnet |
| B. | Permanent magnet |
| C. | Neither electromagnet nor permanent magnet |
| D. | Either electromagnet or permanent magnet |
| Answer» C. Neither electromagnet nor permanent magnet | |
| 53. |
When the current in the current carrying conductor increases, what happens to the force in the conductor which is at right angles to the magnetic field? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Becomes zero |
| Answer» B. Decreases | |
| 54. |
According to Fleming’s right hand rule, the index finger points towards? |
| A. | Current |
| B. | E.M.F. |
| C. | Motion of the conductor |
| D. | Magnetic flux |
| Answer» E. | |
| 55. |
According to Fleming’s right hand rule, the middle finger points towards? |
| A. | Current |
| B. | E.M.F. |
| C. | Motion of the conductor |
| D. | Magnetic flux |
| Answer» C. Motion of the conductor | |
| 56. |
“The direction of an induced e.m.f. is always such that it tends to set up a current opposing the motion or the change of flux responsible for inducing that e.m.f.”, this is the statement for? |
| A. | Fleming’s left hand rule |
| B. | Fleming’s right hand rule |
| C. | Faraday’s law |
| D. | Lenz’s law |
| Answer» E. | |
| 57. |
According to Fleming’s right hand rule, the thumb points towards? |
| A. | Current |
| B. | E.M.F. |
| C. | Motion of the conductor |
| D. | Magnetic flux |
| Answer» D. Magnetic flux | |
| 58. |
What is the strength of magnetic field known as ________ |
| A. | Flux |
| B. | Density |
| C. | Magnetic strength |
| D. | Magnetic flux density |
| Answer» E. | |
| 59. |
Weakest force in nature is? |
| A. | Electric force |
| B. | Gravitational force |
| C. | Weak force |
| D. | Magnetic force |
| Answer» C. Weak force | |
| 60. |
The ratio of magnetic force to electric force on a charged particle getting undeflected in a field is ______ |
| A. | 1 |
| B. | 0 |
| C. | 2 |
| D. | 4 |
| Answer» B. 0 | |
| 61. |
Which, among the following qualities, is not affected by the magnetic field? |
| A. | Moving charge |
| B. | Change in magnetic flux |
| C. | Current flowing in a conductor |
| D. | Stationary charge |
| Answer» E. | |
| 62. |
What is the magnetic field outside a solenoid? |
| A. | Infinity |
| B. | Half the value of the field inside |
| C. | Double the value of the field inside |
| D. | Zero |
| Answer» E. | |
| 63. |
When a charged particle moves at right angles to the magnetic field, the variable quantity is? |
| A. | Momentum |
| B. | Speed |
| C. | Energy |
| D. | Moment of inertia |
| Answer» B. Speed | |
| 64. |
If the flow of electric current is parallel to the magnetic field, the force will be ______ |
| A. | Zero |
| B. | Infinity |
| C. | Maximum |
| D. | Half the original value |
| Answer» B. Infinity | |
| 65. |
The ratio of magnetic force to electric force on a charged particle getting undeflected in a field is? |
| A. | 1 |
| B. | 0 |
| C. | 2 |
| D. | 4 |
| Answer» B. 0 | |
| 66. |
To make the range of voltmeter increased Rh is |
| A. | decreased |
| B. | increased |
| C. | unchanged |
| D. | remain same |
| Answer» C. unchanged | |
| 67. |
In the moving coil galvanometer a soft iron cylinder is placed inside the coil |
| A. | to make zero field |
| B. | to make stronger field |
| C. | to make galvanometer heavier |
| D. | both a and b |
| Answer» C. to make galvanometer heavier | |
| 68. |
The value of magnetic field that will cause a max force of 7 x 10-3N on a 20 cm wire carrying current of 10A will be |
| A. | 3.5 x 10-3T |
| B. | 1.5 x 10-3T |
| C. | 4.5 x 10-3T |
| D. | 2.5 x 10-3T |
| Answer» B. 1.5 x 10-3T | |
| 69. |
The work done by a magnetic field for revolving the charged particle q in a circular path will be |
| A. | fd |
| B. | max |
| C. | negative |
| D. | zero |
| Answer» E. | |
| 70. |
A galvanometer of 50 ohm gives full scale deflection with 2mA current as to convert it into ammeter the range of 10A is connected with it then the shunt resistance will be |
| A. | 0.1 ohm |
| B. | 0.2 ohm |
| C. | 0.01 ohm |
| D. | 0.02 ohm |
| Answer» D. 0.02 ohm | |
| 71. |
The device known as low resistance galvanometer is |
| A. | ammeter |
| B. | ohmmeter |
| C. | voltmeter |
| D. | Avometer |
| Answer» B. ohmmeter | |
| 72. |
A charged particle will move through region getting undeflected if |
| A. | v = B/E |
| B. | v = BE |
| C. | v = E/B |
| D. | v = B + E |
| Answer» D. v = B + E | |
| 73. |
The output of the sweep and time base generator will be |
| A. | sinusoidal waveform |
| B. | cos waveform |
| C. | saw tooth waveform |
| D. | both a and b |
| Answer» D. both a and b | |
| 74. |
When an electron is projected at right angle to uniform magnetic field then it will move along |
| A. | helical path |
| B. | circle |
| C. | straight line |
| D. | cube |
| Answer» C. straight line | |
| 75. |
While grasping wire in right hand with thumb pointing to the direction of current is known as |
| A. | right hand rule |
| B. | left hand rule |
| C. | thumb hand rule |
| D. | both a and b |
| Answer» B. left hand rule | |
| 76. |
According to the system international unit the unit of magnetic flux is |
| A. | tesla |
| B. | NmA-1 |
| C. | weber |
| D. | N/C |
| Answer» D. N/C | |
| 77. |
The magnetic field outside a solenoid is |
| A. | zero |
| B. | strong |
| C. | infinite |
| D. | negligible |
| Answer» E. | |
| 78. |
Solenoid of 15 cm long has 300 turns if current flowing through the solenoid is 5A then magnetic field inside the solenoid will be |
| A. | 2.3 x 102 |
| B. | 1.3 x 102 |
| C. | 1.1 x 102 |
| D. | 1.4 x 102 |
| Answer» C. 1.1 x 102 | |
| 79. |
The electronic device named as cathode ray oscilloscope is known as |
| A. | graph plotting device |
| B. | plotting device |
| C. | printing device |
| D. | both a and b |
| Answer» B. plotting device | |
| 80. |
When charged particle is projected opposite to the direction of magnetic field then it experiences force equal to |
| A. | qvBcos |
| B. | qvBsin |
| C. | qvB |
| D. | zero |
| Answer» E. | |
| 81. |
Magnetic force acting on a charge is given by the formula |
| A. | q(V-B) |
| B. | q(V + B) |
| C. | q(V/B) |
| D. | q(VxB) |
| Answer» E. | |
| 82. |
The product of the force and moment arm is known as |
| A. | potential difference |
| B. | voltage |
| C. | torque |
| D. | inertia |
| Answer» D. inertia | |
| 83. |
The electric instrument used to measure current in amperes is known as |
| A. | ammeter |
| B. | voltmeter |
| C. | ohmmeter |
| D. | Avometer |
| Answer» B. voltmeter | |
| 84. |
Magnetic field is set up in region surrounding the current carrying |
| A. | rod |
| B. | wire |
| C. | blog |
| D. | plate |
| Answer» C. blog | |
| 85. |
A power line 10m high carries current 200A then the magnetic field will be |
| A. | 2 x 106T |
| B. | 3 x 106T |
| C. | 4 x 106T |
| D. | 5 x 106T |
| Answer» D. 5 x 106T | |
| 86. |
A 20 cm wire carrying current of 10A with magnetic field 0.30T having angle 40° will produce the force of |
| A. | 0.21N |
| B. | 0.25N |
| C. | 0.31N |
| D. | 0.39N |
| Answer» E. | |
| 87. |
The electron moving at rate of 2 x 107 in uniform magnetic field of 1.10 x 10-3 then the radius of an orbit will be |
| A. | 9.4 x 10-2m |
| B. | 9 x 10-2m |
| C. | 5.4 x 10-2m |
| D. | 1.4 x 10-2m |
| Answer» B. 9 x 10-2m | |
| 88. |
In SI unit of magnetic induction is |
| A. | N/C |
| B. | tesla |
| C. | weber |
| D. | NmA-1 |
| Answer» C. weber | |
| 89. |
In order to increase the range of ammeter, the value of shunt resistance Rs is |
| A. | increased |
| B. | decreased |
| C. | remain |
| D. | both a and b |
| Answer» C. remain | |
| 90. |
One of the following quantities that is not affected by the magnetic field is |
| A. | moving charge |
| B. | change in magnetic flux |
| C. | current flowing in conductor |
| D. | stationary charge |
| Answer» E. | |
| 91. |
In cathode ray oscilloscope the spots are formed on screen having |
| A. | anode |
| B. | cathode |
| C. | grid |
| D. | matrix |
| Answer» D. matrix | |
| 92. |
Charged particle q moving through magnetic with velocity V will have zero magnetic force when angle is |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | both a and b |
| Answer» E. | |
| 93. |
In a magnetic field of 2.50 x 10-3T such that magnetic force is equal to its weight then proton moves with the speed of |
| A. | 3.09 x 10-5 m/s |
| B. | 4.09 x 10-5 m/s |
| C. | 2.09 x 10-5 m/s |
| D. | 0.09 x 10-5 m/s |
| Answer» C. 2.09 x 10-5 m/s | |
| 94. |
If magnetic field in certain region is given by B = (40i-18k)Wbm2 then the flux passes through 5 cm2 area loop will be |
| A. | 90 x 10-4 |
| B. | 91 x 10-4 |
| C. | 92 x 10-4 |
| D. | 94 x 10-4 |
| Answer» B. 91 x 10-4 | |
| 95. |
Ratio of magnetic force Fm and electric force Fe acting on a charge getting undflected through the field is |
| A. | E/B |
| B. | B/E |
| C. | 1 |
| D. | 0 |
| Answer» D. 0 | |
| 96. |
The cathode ray oscilloscope displays the graph of the waveforms based on |
| A. | current |
| B. | voltage |
| C. | potential difference |
| D. | temperature |
| Answer» C. potential difference | |
| 97. |
The moving charge experiences magnetic force because of |
| A. | magnetic flux |
| B. | magnetic field |
| C. | magnetic current |
| D. | both a and b |
| Answer» C. magnetic current | |
| 98. |
The torque of the couple is given by ILBxa in which a is a |
| A. | momentum |
| B. | moment arm |
| C. | arm |
| D. | moment of inertia |
| Answer» C. arm | |
| 99. |
When a charged particle moves at right angle to a magnetic field the quantity that changes is |
| A. | momentum |
| B. | speed |
| C. | energy |
| D. | moment of inertia |
| Answer» B. speed | |
| 100. |
The magnetic field inside a solenoid is |
| A. | zero |
| B. | weak |
| C. | uniform |
| D. | non-uniform |
| Answer» D. non-uniform | |