Chapter 19-3 and 20
... produce a field that opposes the change causing it. ► This rule can be used to find the direction of the current in the ...
... produce a field that opposes the change causing it. ► This rule can be used to find the direction of the current in the ...
GENERAL MAGNET CHARACTERISTICS (physics 2)
... Each domain’s μ orientation is different from the others; they cancel each other out, producing a material with no magnetic characteristic. The external B-field causes the particles to rotate in alignment with the field, causing domains to grow/shrink, producing a net μ direction throughout the enti ...
... Each domain’s μ orientation is different from the others; they cancel each other out, producing a material with no magnetic characteristic. The external B-field causes the particles to rotate in alignment with the field, causing domains to grow/shrink, producing a net μ direction throughout the enti ...
Name Section 18-1 “Magnets and Magnetism” pages 510
... _______________________ 8. can push magnets apart or pull them together _______________________ 9. depend on how two magnets’ poles line up _______________________ 10. are regions around magnets in which magnetic forces can act _______________________ 11. shape that can be shown with lines that surr ...
... _______________________ 8. can push magnets apart or pull them together _______________________ 9. depend on how two magnets’ poles line up _______________________ 10. are regions around magnets in which magnetic forces can act _______________________ 11. shape that can be shown with lines that surr ...
MCQ based on activity for 10 CBSE Magnetic effect of current
... B. magnetic effect of a permanent magnet C. magnetic effects of current 8) The loops in the conductor repel each other when current is passed through them. A. depends on the type of current B. (AC/DC) depends on the radius of the loops ...
... B. magnetic effect of a permanent magnet C. magnetic effects of current 8) The loops in the conductor repel each other when current is passed through them. A. depends on the type of current B. (AC/DC) depends on the radius of the loops ...
Electromagnet
An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. The magnetic field disappears when the current is turned off. Electromagnets usually consist of a large number of closely spaced turns of wire that create the magnetic field. The wire turns are often wound around a magnetic core made from a ferromagnetic or ferrimagnetic material such as iron; the magnetic core concentrates the magnetic flux and makes a more powerful magnet.The main advantage of an electromagnet over a permanent magnet is that the magnetic field can be quickly changed by controlling the amount of electric current in the winding. However, unlike a permanent magnet that needs no power, an electromagnet requires a continuous supply of current to maintain the magnetic field.Electromagnets are widely used as components of other electrical devices, such as motors, generators, relays, loudspeakers, hard disks, MRI machines, scientific instruments, and magnetic separation equipment. Electromagnets are also employed in industry for picking up and moving heavy iron objects such as scrap iron and steel.