electronics-magnetism-and-electromagnetism Related Question Answers
1. The Hall effect
2. "Series" and "parallel" as applied to dc motors refer to
3. The component that produces power in an electromagnetic generator is called the
4. What is the magnetomotive force in a 150-turn coil of wire with 2 A flowing through it?
5. A Hall effect sensor
6. Which electromagnetic device has a flexible cone?
7. What is the reluctance of a material that has a length of 0.045 m, a cross-sectional area of 0.015 m2, and a permeability of 2500 µWb/At·m?
9. What do you call the characteristic of a magnetic material whereby a change in magnetization lags the application of a magnetizing force?
10. Which electromagnetic device has a movable iron core called a plunger?
11. Which electromagnetic device contains an armature?
12. The polarity of induced voltage while a field is collapsing is
14. The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called retentivity.
15. Magnetic flux flows from the north pole to the south pole within the magnet.
16. The Hall voltage is the voltage created by a conductor moving through a magnetic field.
17. The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called hysteresis.
20. A voltage is induced across a conductor if it remains absolutely stationary within a magnetic field.
21.
When the south poles of two bar magnets are brought close together, there will be a force of attraction.
23. A magnetic material such as iron can change the course of magnetic lines of force.
24. The induced emf of a conductor cutting flux lines is directly proportional to the rate of cutting.
25. The magnetic field, current through the Hall element, and Hall voltage are all at right angles to each other.
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