Chapter 21: Electricity pp. 592-618
... A pole is the area of the magnet where the magnetic effect is the strongest. One pole of the magnet will always point north this is the north pole. The south pole will point south. The north and south poles are unlike and therefore attract. ...
... A pole is the area of the magnet where the magnetic effect is the strongest. One pole of the magnet will always point north this is the north pole. The south pole will point south. The north and south poles are unlike and therefore attract. ...
Chapter 11: Thermochemistry
... In a magnet, the field is produced by the motion and spin of the electrons Many electrons spinning in the same direction produces a stronger magnet Electrons spinning in opposite directions cancel each other. This is why most substances are not magnetic With iron, each individual atom creates a magn ...
... In a magnet, the field is produced by the motion and spin of the electrons Many electrons spinning in the same direction produces a stronger magnet Electrons spinning in opposite directions cancel each other. This is why most substances are not magnetic With iron, each individual atom creates a magn ...
Word
... charges, but an isolated magnetic pole has never been observed. If you start with a bar magnet and cut it in half you will have two magnets, each with a north pole and a south pole. Each time you cut it in half you will still have pieces with a north and a south pole. There is a relationship between ...
... charges, but an isolated magnetic pole has never been observed. If you start with a bar magnet and cut it in half you will have two magnets, each with a north pole and a south pole. Each time you cut it in half you will still have pieces with a north and a south pole. There is a relationship between ...
Magnetism
... charges, but an isolated magnetic pole has never been observed. If you start with a bar magnet and cut it in half you will have two magnets, each with a north pole and a south pole. Each time you cut it in half you will still have pieces with a north and a south pole. There is a relationship between ...
... charges, but an isolated magnetic pole has never been observed. If you start with a bar magnet and cut it in half you will have two magnets, each with a north pole and a south pole. Each time you cut it in half you will still have pieces with a north and a south pole. There is a relationship between ...
chapter24a - Interactive Learning Toolkit
... domains of the material. A magnetic field can force the domains to line up, and the material itself can become magnetic. (Ex: iron, nickel, cobalt, steel) Paramagnetic materials are weakly attracted to magnets. The atoms of these substances contain electrons most of which spin in the same direction, ...
... domains of the material. A magnetic field can force the domains to line up, and the material itself can become magnetic. (Ex: iron, nickel, cobalt, steel) Paramagnetic materials are weakly attracted to magnets. The atoms of these substances contain electrons most of which spin in the same direction, ...
pptx - LSU Physics
... another right hand rule?! Curl fingers around direction of CURRENT. Thumb points along FIELD! Into page in this case. ...
... another right hand rule?! Curl fingers around direction of CURRENT. Thumb points along FIELD! Into page in this case. ...
problems
... (a) Find the force on the electron (b) What is the electron’s speed? (c) By how much does its speed change in 1 ns? 11. The magnitude of the Earth’s magnetic field is a little less than 1 G (or 10-4 T) near the Earth’s surface. What is the maximum possible magnetic force on an electron with kinetic ...
... (a) Find the force on the electron (b) What is the electron’s speed? (c) By how much does its speed change in 1 ns? 11. The magnitude of the Earth’s magnetic field is a little less than 1 G (or 10-4 T) near the Earth’s surface. What is the maximum possible magnetic force on an electron with kinetic ...
Problems for week 10
... The unit of magnetic flux is named for Wilhelm Weber. The practical-size unit of magnetic field is named for Johann Karl Friedrich Gauss. Both were scientists at Göttingen, Germany. Along with their individual accomplishments, together they built a telegraph in 1833. It consisted of a battery and sw ...
... The unit of magnetic flux is named for Wilhelm Weber. The practical-size unit of magnetic field is named for Johann Karl Friedrich Gauss. Both were scientists at Göttingen, Germany. Along with their individual accomplishments, together they built a telegraph in 1833. It consisted of a battery and sw ...
Electromagnetic Induction
... – Faraday discovered that three factors influence the magnitude of emf and induced current in the wire: – The velocity of the wire – the higher the velocity, the greater the emf and current. – The strength of the magnetic field – the stronger the magnetic field, the greater the emf and current. – Th ...
... – Faraday discovered that three factors influence the magnitude of emf and induced current in the wire: – The velocity of the wire – the higher the velocity, the greater the emf and current. – The strength of the magnetic field – the stronger the magnetic field, the greater the emf and current. – Th ...
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.