Lawson criterion / plasma physics
... Potential in vacuum The length scale for shielding is the Debye length which depends on both Temperature as well as density. It is around 10-5 m for a fusion plasma ...
... Potential in vacuum The length scale for shielding is the Debye length which depends on both Temperature as well as density. It is around 10-5 m for a fusion plasma ...
Lesson Plan
... 2.) rub the magnet on one end of the paperclip for about 30 seconds (it's important that the students only touch one end of the paperclip to the magnet for best results) 3.) float the paperclip on top of the piece of paper in the cup, allowing the paper and the clip to move freely (i.e. it shouldn't ...
... 2.) rub the magnet on one end of the paperclip for about 30 seconds (it's important that the students only touch one end of the paperclip to the magnet for best results) 3.) float the paperclip on top of the piece of paper in the cup, allowing the paper and the clip to move freely (i.e. it shouldn't ...
Some of my Demonstrations in Class
... by moving myself back and forth relative to the student. The student is the detector of electric and magnetic fields, the intensity of which change as I move. Once you have done experiments establishing the facts that the movement of electric charges cause magnetic fields and that both magnetic and ...
... by moving myself back and forth relative to the student. The student is the detector of electric and magnetic fields, the intensity of which change as I move. Once you have done experiments establishing the facts that the movement of electric charges cause magnetic fields and that both magnetic and ...
8 - web page for staff
... When the external field is applied, those domains which are in the direction of the applied field increase their size at the expense of their neighbors, and the internal field increases greatly over that of the external field alone. When the external field is removed, a completely random domain alig ...
... When the external field is applied, those domains which are in the direction of the applied field increase their size at the expense of their neighbors, and the internal field increases greatly over that of the external field alone. When the external field is removed, a completely random domain alig ...
Lenz` Law, Motional emf, Induced emf and Electric Field Script Lenz
... causes a flow of current. The induction of the current implies there is an electric field tangent to the loop of wire because that is the direction of the current. Work Done on the Charge The work done by the electric field on charges is qE. The work done by the electric force to move the charges ar ...
... causes a flow of current. The induction of the current implies there is an electric field tangent to the loop of wire because that is the direction of the current. Work Done on the Charge The work done by the electric field on charges is qE. The work done by the electric force to move the charges ar ...
Magnetism
... If a piece of iron, for example, is placed near a strong permanent magnet, it will become magnetized ...
... If a piece of iron, for example, is placed near a strong permanent magnet, it will become magnetized ...
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.