Electricity & Magnetism
... All of us are familiar with magnets. In a magnet we have magnetic poles – the north and the south pole. – A North seeking pole is called the North Pole. – A South seeking pole is called the South Pole. Like magnetic poles repel and unlike magnetic poles ...
... All of us are familiar with magnets. In a magnet we have magnetic poles – the north and the south pole. – A North seeking pole is called the North Pole. – A South seeking pole is called the South Pole. Like magnetic poles repel and unlike magnetic poles ...
Magnetic Materials
... Area integral about a closed surface Line integral about a closed loop. Note it is a dot product Similar to drawing a Gaussian surface ...
... Area integral about a closed surface Line integral about a closed loop. Note it is a dot product Similar to drawing a Gaussian surface ...
Exercises – Chapter 11
... 1. Is it possible to have two permanent magnets that always attract one another, regardless of their relative orientations? Explain. E.1 ...
... 1. Is it possible to have two permanent magnets that always attract one another, regardless of their relative orientations? Explain. E.1 ...
Rad 160 – Radiographic Physics Unit 4 Magnetism I. Magnetism A
... b. Lines repel each other when they are in the same direction and attract when in the opposite direction. c. The field is distorted by magnetic materials but not affected by nonmagnetic materials. H. Magnetic Induction 1. The temporary magnetizing of a nonmagnetized material by bringing it into the ...
... b. Lines repel each other when they are in the same direction and attract when in the opposite direction. c. The field is distorted by magnetic materials but not affected by nonmagnetic materials. H. Magnetic Induction 1. The temporary magnetizing of a nonmagnetized material by bringing it into the ...
Now
... More about gravity • The gravity of a planet or moon depends on the amount of matter it contains, or its mass. • The moon, with one-sixth the mass of the Earth, has one-sixth the Earth’s gravity. • Weight is the measure of the pull of gravity on an object NOT the amount of material in the object. ...
... More about gravity • The gravity of a planet or moon depends on the amount of matter it contains, or its mass. • The moon, with one-sixth the mass of the Earth, has one-sixth the Earth’s gravity. • Weight is the measure of the pull of gravity on an object NOT the amount of material in the object. ...
magnetism
... Electric motors are used to convert electric energy into mechanical energy. They use magnetism and electric currents to operate. ...
... Electric motors are used to convert electric energy into mechanical energy. They use magnetism and electric currents to operate. ...
![L 28 Electricity and Magnetism [6] Basic facts of Magnetism Induced](http://s1.studyres.com/store/data/001450251_1-3da8d040f51176abf8f36c3cf95f00b4-300x300.png)
Preclass video slides - University of Toronto Physics
... Magnetism is not the same as electricity. Magnetism is a long range force. All magnets have two poles poles, called north and south poles. Two like poles exert repulsive forces on each other; two opposite poles attract. attract The poles of a bar magnet can be identified by using it as a compass. Th ...
... Magnetism is not the same as electricity. Magnetism is a long range force. All magnets have two poles poles, called north and south poles. Two like poles exert repulsive forces on each other; two opposite poles attract. attract The poles of a bar magnet can be identified by using it as a compass. Th ...
Practice Final P132 Spring 2004 9:30 section
... a) Qa and Qb must have the same magnitude and sign. b) Qa and Qb must have the same magnitude but different sign. c) P must be midway between the two charges d) Qa and Qb can have different magnitudes but must have the same sign. e) Qa and Qb can have opposite signs but must have the same magnitude. ...
... a) Qa and Qb must have the same magnitude and sign. b) Qa and Qb must have the same magnitude but different sign. c) P must be midway between the two charges d) Qa and Qb can have different magnitudes but must have the same sign. e) Qa and Qb can have opposite signs but must have the same magnitude. ...
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.