MCQOPTIONS
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MCQOPTIONS
This section includes 65 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. |
he retentivity (a property) of material is useful for the construction of__________? |
| A. | permanent magnets |
| B. | transformers |
| C. | non-magnetic substances |
| D. | electromagnets |
| Answer» B. transformers | |
| 52. |
he retentivity (a property) of material is useful for the construction of_______________? |
| A. | permanent magnets |
| B. | transformers |
| C. | non-magnetic substances |
| D. | electromagnets |
| Answer» B. transformers | |
| 53. |
Gilbert is a unit of_______________? |
| A. | electromotive force |
| B. | magnetomotive force |
| C. | conductance |
| D. | permittivity |
| Answer» C. conductance | |
| 54. |
Fleming’s left hand rule is used to find_________________? |
| A. | direction of magnetic field due to current carrying conductor |
| B. | direction of flux in a solenoid |
| C. | direction of force on a current carrying conductor in a magnetic field |
| D. | polarity of a magnetic pole |
| Answer» D. polarity of a magnetic pole | |
| 55. |
Ferrites are materials |
| A. | paramagnetic |
| B. | diamagnetic |
| C. | ferromagnetic |
| D. | none of the above |
| Answer» D. none of the above | |
| 56. |
Ferrites are a sub-group of_______________? |
| A. | non-magnetic materials |
| B. | ferro-magnetic materials |
| C. | paramagnetic materials |
| D. | ferri-magnetic materials |
| Answer» E. | |
| 57. |
Core of an electromagnet should have____________? |
| A. | low coercivity |
| B. | high susceptibility |
| C. | both of the above |
| D. | none of the above |
| Answer» D. none of the above | |
| 58. |
Air gap has_________eluctance as compared to iron or steel path? |
| A. | little |
| B. | lower |
| C. | higher |
| D. | zero |
| Answer» C. higher | |
| 59. |
A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be______________? |
| A. | M |
| B. | M/2 |
| C. | 2 M |
| D. | M/4 |
| Answer» C. 2 M | |
| 60. |
A permeable substance is one_____________? |
| A. | which is a good conductor |
| B. | which is a bad conductor |
| C. | which is a strong magnet |
| D. | through which the magnetic lines of force can pass very easily |
| Answer» E. | |
| 61. |
A permanent magnet______________? |
| A. | attracts some substances and repels others |
| B. | attracts all paramagnetic substances and repels others |
| C. | attracts only ferromagnetic substances |
| D. | attracts ferromagnetic substances and repels all others |
| Answer» B. attracts all paramagnetic substances and repels others | |
| 62. |
A material which is slightly repelled by a magnetic field is known as_____________? |
| A. | ferromagnetic material |
| B. | diamagnetic material |
| C. | paramagnetic material |
| D. | conducting material |
| Answer» C. paramagnetic material | |
| 63. |
A magnetic field exists around____________? |
| A. | iron |
| B. | copper |
| C. | aluminium |
| D. | moving charges |
| Answer» E. | |
| 64. |
A keeper is used to_____________? |
| A. | change the direction of magnetic lines |
| B. | amplify flux |
| C. | restore lost flux |
| D. | provide a closed path for flux |
| Answer» E. | |
| 65. |
A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be______________? |
| A. | zero |
| B. | BLI |
| C. | B2LI |
| D. | BLI2 |
| Answer» B. BLI | |