Electrical Engineering Questions and Answers

51. What is the magnetomotive force in a 75-turn coil of wire when there are 4 A of current through it?

300 AT

52. The direction of a magnetic field within a magnet is from south to......


53. what you mran by retentivity

The ability of a material to remain magnetized after removal of the magnetizing force

54. If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage.....


55. The induced voltage across a stationary conductor in a stationary magnetic field is.....


56. A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is....


57. How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?

90 V

58. The primary winding of a power transformer should always be.....


59. The primary winding of a transformer has 110 V ac across it. What is the secondary voltage if the turns ratio is 8?

880 V

60. A certain transformer has a turns ratio of 1 and a 0.85 coefficient of coupling. When 2 V ac is applied to the primary, the secondary voltage is.....

1.7 V

61. mica or glass has the highest dielectric constant?


62. paper or glass has the highest dielectric constant?


63. When the plate area of a capacitor increases....... increases


64.When the voltage across a capacitor is tripled, the stored charge triples - true or false?


65. Resistance is measured in......



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