Paleomagnetism
... Detecting the Field • Earth’s magnetic field can’t be seen by the naked eye, and it also can’t be detected by a compass. • Instead, we use a device called a magnetometer which graphs out the changes in the magnetic field. • It is built into a ship or an airplane. ...
... Detecting the Field • Earth’s magnetic field can’t be seen by the naked eye, and it also can’t be detected by a compass. • Instead, we use a device called a magnetometer which graphs out the changes in the magnetic field. • It is built into a ship or an airplane. ...
Chapter 6 Part1: Multiple choices
... 7. What energy conversion is achieved by the electric generator? A. Mechanical energy to electrical energy B. Electrical energy to mechanical energy C. Electrical energy to solar energy D. Mechanical energy to nuclear energy 8. If you constantly push the bar magnet through the loop as shown below, t ...
... 7. What energy conversion is achieved by the electric generator? A. Mechanical energy to electrical energy B. Electrical energy to mechanical energy C. Electrical energy to solar energy D. Mechanical energy to nuclear energy 8. If you constantly push the bar magnet through the loop as shown below, t ...
Monday - LSU Physics
... that move generate this new type of force called magnetism. In magnets, the moving charges are the electrons in the atoms that make the materials. In electromagnets, they are the charges that make up the current in the wire. ...
... that move generate this new type of force called magnetism. In magnets, the moving charges are the electrons in the atoms that make the materials. In electromagnets, they are the charges that make up the current in the wire. ...
Magnetism.
... would move if put there (field lines). They gather most thickly where the force on the iron would be the greatest (larger field line density). ...
... would move if put there (field lines). They gather most thickly where the force on the iron would be the greatest (larger field line density). ...
Notes Sec 4.1
... are not at the north pole or the south pole. Actually they are 1500km from the N pole and 2600km from the S pole. Draw figure 4.6 Label -geographic north and south pole -geomagnetic north and south -the bar magnet inside the earth ...
... are not at the north pole or the south pole. Actually they are 1500km from the N pole and 2600km from the S pole. Draw figure 4.6 Label -geographic north and south pole -geomagnetic north and south -the bar magnet inside the earth ...
Week 8 Homework 1 Serway 20.1 Physics 1B
... in magnetic field strength, magnetic field direction, or area perpendicular to the magnetic field. Since the magnetic field in this problem is constant (not changing in magnitude or direction), an emf can only be produced by changing the area perpendicular to the magnetic field. This amounts to rota ...
... in magnetic field strength, magnetic field direction, or area perpendicular to the magnetic field. Since the magnetic field in this problem is constant (not changing in magnitude or direction), an emf can only be produced by changing the area perpendicular to the magnetic field. This amounts to rota ...
Presentations
... “I'm not sure I comprehend the drawing correctly, but I think the reaction would gravitate upward in reaction to the north pole of the magnet.” “since the loop is not moving there is no energy produced.” ...
... “I'm not sure I comprehend the drawing correctly, but I think the reaction would gravitate upward in reaction to the north pole of the magnet.” “since the loop is not moving there is no energy produced.” ...
Magnetism
... around the wire. • Put the wire coil between two permanent magnets. • If the current changes direction, the poles of the magnet are reversed. • The commutator changes the direction of current in the wire so that the coil keeps moving in a circle. • The rotating coil spins, changing electric energy t ...
... around the wire. • Put the wire coil between two permanent magnets. • If the current changes direction, the poles of the magnet are reversed. • The commutator changes the direction of current in the wire so that the coil keeps moving in a circle. • The rotating coil spins, changing electric energy t ...
Magnetic Fields and Oersted`s Principle
... The discovery of magnets is attributed in legend to Magnes, a shepherd who lived in the area of Magnesia, Greece, over 4000 years ago. He was surprised one day when he stepped on a rock and the iron nails in his sandals stuck to it. This type of rock came to be known as magnetite. Basic Properties o ...
... The discovery of magnets is attributed in legend to Magnes, a shepherd who lived in the area of Magnesia, Greece, over 4000 years ago. He was surprised one day when he stepped on a rock and the iron nails in his sandals stuck to it. This type of rock came to be known as magnetite. Basic Properties o ...
Solutions to Period 16 Exercises
... d) have none of the above. E.1 = a E.2 You wish to design an electric motor. Which of the following motor designs will NOT work? a) An electromagnet is used to spin a permanent magnet. b) A permanent magnet is used to spin an electromagnet. c) ...
... d) have none of the above. E.1 = a E.2 You wish to design an electric motor. Which of the following motor designs will NOT work? a) An electromagnet is used to spin a permanent magnet. b) A permanent magnet is used to spin an electromagnet. c) ...
Magnet
A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, ""Magnesian stone"") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.Ferromagnetic materials can be divided into magnetically ""soft"" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically ""hard"" materials, which do. Permanent magnets are made from ""hard"" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. ""Hard"" materials have high coercivity, whereas ""soft"" materials have low coercivity.An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of ""soft"" ferromagnetic material such as steel, which greatly enhances the magnetic field produced by the coil.The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.