Magnetism Review game Thursday
... 3. Each person receives a question, correct answers stay up, wrong answers sit down. 4. Team with most players still up at the end wins (3 Extra Credit points on the test) ...
... 3. Each person receives a question, correct answers stay up, wrong answers sit down. 4. Team with most players still up at the end wins (3 Extra Credit points on the test) ...
Honors Physics
... 11. What causes the earth to have its magnetic field? 12. What is the difference between geographic north and a compass reading called? 13. What direction do the field lines “move” in a magnet? 14. Describe what happen to a wire placed in a magnetic field when current passes through the wire in both ...
... 11. What causes the earth to have its magnetic field? 12. What is the difference between geographic north and a compass reading called? 13. What direction do the field lines “move” in a magnet? 14. Describe what happen to a wire placed in a magnetic field when current passes through the wire in both ...
Electromagnetism
... • A coil of wire that produces a magnetic field when carrying an electric current. • The magnetic field of each loop combines to strengthen the magnetic field. ...
... • A coil of wire that produces a magnetic field when carrying an electric current. • The magnetic field of each loop combines to strengthen the magnetic field. ...
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.