7. The reluctance in the core increase because The area decrease. a. b. The area

Question

7. The reluctance in the core increase because The area decrease. a. b. The area increase. c. Mean path length decrease. d. Windings turn increase. 8. The reluctance in the air gap increase because: a. The effective area decrease. b· The effective area increase. c. d. The permeability decrease. The permeability increase. 9. The permeability is: a. b. c. d. The induced voltage created by the change of the magnetic flux in time The effort that a current establish voltage The effort that a current establish a magnetic field. The capacity of the material to establish magnetic field. 10. Ampere's Law describes The capacity of the material to establish temperature. a. b. c. d. The induced voltage created by the change of the magnetic flux in time The capacity of the current to establish a magnetic field around a conductor. The effort that a current establish voltage 11. Saturation point is: a. Produce a residual magnetic flux. b. The permeability begins to increase when the magnetic field intensity increase. c. The reluctance begins to decrease when the magnetic field intensity increase. d. There is no a significative change in the magnetic field when the magnetic field intensity increase. 12. The concept that is in opposition of the magnetic flux is: a. Voltage b. Resistance c. Reluctance d. Permeability 13. If the magnetic field remains constant and the permeability decrease then magnetic field intensity a. Remains constant b. Increase c. Decrease d. No enough data (1 point) 1(1) Question: what variable represents the magnetic flux ?

Explanation / Answer

7) a) the area decreases.

8) a) the effective area decreases.

9) d) the capacity of the material to establish magnetic field.

11) d) there is no significant change in the magnetic field when the magnetic filed intensity increase.

12) c) reluctance

13) b) increase.

1(B) The magnetic flux is proportional to the number of field lines passing through that surface .

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