Magnetism and Electromagnetism Questions

• The component that produces power in an electromagnetic generator is called the
• A Hall effect sensor
• 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?
• What is the flux density of a magnetic field whose flux is 3000 µWb and cross-sectional area is 0.25 m2?
• Which electromagnetic device uses brushes and a commutator?
• The Hall effect
• What are the effects of moving a closed wire loop through a magnetic field?
• Which electromagnetic device has a movable iron core called a plunger?
• Which electromagnetic device has a flexible cone?
• What is the magnetomotive force in a 150-turn coil of wire with 2 A flowing through it?
• What do you call the characteristic of a magnetic material whereby a change in magnetization lags the application of a magnetizing force?
• The unit of flux density is known as
• Which two values are plotted on a B-H curve graph?
• "Series" and "parallel" as applied to dc motors refer to
• Which electromagnetic device contains an armature?
• How much flux is there in a magnetic field when its flux density is 5000 µT and its cross-sectional area is 300 mm2?
• The polarity of induced voltage while a field is collapsing is
• Permeability is the inverse equivalent of which electrical term?
• The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called hysteresis.
• The unit of magnetic flux is the weber.