Lecture9-14
... Magnetic field Magnetic fields are everywhere. Since ancient times the magnetic field of the Earth was used for orientation and magnetic stones (magnetite) were known. The magnetic field of a magnet is apparently similar to that of an electric dipole. However, inside the magnet the lines point in op ...
... Magnetic field Magnetic fields are everywhere. Since ancient times the magnetic field of the Earth was used for orientation and magnetic stones (magnetite) were known. The magnetic field of a magnet is apparently similar to that of an electric dipole. However, inside the magnet the lines point in op ...
CLASS X Questions Bank Magnetic effects of electric current
... electrical appliances made by using permanent magnets. 7. (a)Draw a schematic labeled diagram of a domestic wiring circuit which includes (i)a main fuse (ii) a power meter (iii)one light point (iv) a power plug.(b) Why is it necessary to connect an earth wire to electric appliances having metallic c ...
... electrical appliances made by using permanent magnets. 7. (a)Draw a schematic labeled diagram of a domestic wiring circuit which includes (i)a main fuse (ii) a power meter (iii)one light point (iv) a power plug.(b) Why is it necessary to connect an earth wire to electric appliances having metallic c ...
MAGNETISM MAGNETISM
... that the outside magnetic field itself rotates. The inner coils around the central rotor of the motor are not connected to a current source. Instead, a current is induced in them by the magnetic field of the stator, and this induced current creates the inner magnetic field that attempts to align its ...
... that the outside magnetic field itself rotates. The inner coils around the central rotor of the motor are not connected to a current source. Instead, a current is induced in them by the magnetic field of the stator, and this induced current creates the inner magnetic field that attempts to align its ...
Magnetic Fields FACILITATOR NOTES
... using either iron filings or a magnetic field probe. Show the students first that the SAM robot moves relatively straight when there are no magnets nearby. Then place a strong bar magnet to the right of the robot’s path with the magnet’s N end up. Ask the students to predict how they think the magne ...
... using either iron filings or a magnetic field probe. Show the students first that the SAM robot moves relatively straight when there are no magnets nearby. Then place a strong bar magnet to the right of the robot’s path with the magnet’s N end up. Ask the students to predict how they think the magne ...
Electromagnetic Waves
... ! To calculate the magnetic field between the two plates of the capacitor, we assume that the volume between the two plates can be replaced with a conductor of radius R carrying current id ! Thus from chapter 27 we know that the magnetic field at a distance from the center of the capacitor is given ...
... ! To calculate the magnetic field between the two plates of the capacitor, we assume that the volume between the two plates can be replaced with a conductor of radius R carrying current id ! Thus from chapter 27 we know that the magnetic field at a distance from the center of the capacitor is given ...
Magnetic Field of Earth
... The phenomenon of magnetic properties of the matter was known around the VIII. century. In 1750 John Michell used a torsion balance to show that magnetic poles exert attractive or repulsive forces on each other and that these forces vary the inverse square of their separation. Although the force bet ...
... The phenomenon of magnetic properties of the matter was known around the VIII. century. In 1750 John Michell used a torsion balance to show that magnetic poles exert attractive or repulsive forces on each other and that these forces vary the inverse square of their separation. Although the force bet ...
PHYS 632 Lecture 11: Magnetism of Matter: Maxwell`s
... In 1873 he wrote down 4 equations which govern all classical electromagnetic phenomena. You already know two of them. ...
... In 1873 he wrote down 4 equations which govern all classical electromagnetic phenomena. You already know two of them. ...
FinalToknowSCI113Fall13
... around a straight wire with current depends on the distance to the wire and on the current. You should understand and be able to use Ampere’s law and know and understand how the “Circulation of the magnetic field around a loop” (and in general, the circulation of any vector field along a curve) is d ...
... around a straight wire with current depends on the distance to the wire and on the current. You should understand and be able to use Ampere’s law and know and understand how the “Circulation of the magnetic field around a loop” (and in general, the circulation of any vector field along a curve) is d ...
Faraday`s Law
... A straight electrical conductor of length ! Moving with a velocity v through a uniform magnetic field B directed perpendicular to v. Due to the magnetic force on electrons, the ends of the conductor ...
... A straight electrical conductor of length ! Moving with a velocity v through a uniform magnetic field B directed perpendicular to v. Due to the magnetic force on electrons, the ends of the conductor ...
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (symbol: A·m−1 or A/m) in the SI. B is measured in teslas (symbol:T) and newtons per meter per ampere (symbol: N·m−1·A−1 or N/(m·A)) in the SI. B is most commonly defined in terms of the Lorentz force it exerts on moving electric charges.Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge. In quantum physics, the electromagnetic field is quantized and electromagnetic interactions result from the exchange of photons.In everyday life, magnetic fields are most often encountered as a force created by permanent magnets, which pull on ferromagnetic materials such as iron, cobalt, or nickel, and attract or repel other magnets. Magnetic fields are widely used throughout modern technology, particularly in electrical engineering and electromechanics. The Earth produces its own magnetic field, which is important in navigation, and it shields the Earth's atmosphere from solar wind. Rotating magnetic fields are used in both electric motors and generators. Magnetic forces give information about the charge carriers in a material through the Hall effect. The interaction of magnetic fields in electric devices such as transformers is studied in the discipline of magnetic circuits.