7TH CLASSES PHYSICS DAILY PLAN
... force on one another. The region about a magnet where its influence is understood or shown is called ``magnetic field of that magnet``. Magnetic field lines are directed away from on N pole and towards on S pole. Where the magnetic field lines are close together the field is strong and where the ...
... force on one another. The region about a magnet where its influence is understood or shown is called ``magnetic field of that magnet``. Magnetic field lines are directed away from on N pole and towards on S pole. Where the magnetic field lines are close together the field is strong and where the ...
Magnetism
... A compass can be made with a needle, a magnet, a bowl of water, and a sponge. First, rub the needle on the magnet. Rub it quickly and always in the same direction. Rubbing the needle on the magnet gives it a magnetic field. Then, put the needle on the sponge. Place the needle parallel to the water’s ...
... A compass can be made with a needle, a magnet, a bowl of water, and a sponge. First, rub the needle on the magnet. Rub it quickly and always in the same direction. Rubbing the needle on the magnet gives it a magnetic field. Then, put the needle on the sponge. Place the needle parallel to the water’s ...
3 Magnetism
... JJG JJG B = μ 0 (1 + χ ) H = μ 0 μ ' H JJG JJG μ ' < 1 so the induction is less than the induction in vacuum B0 = μ 0 H . The atoms of a diamagnetic substance have no intrinsic magnetic dipole moment. However, a magnetic dipole may be induced by the action of an external field. These induced dipoles ...
... JJG JJG B = μ 0 (1 + χ ) H = μ 0 μ ' H JJG JJG μ ' < 1 so the induction is less than the induction in vacuum B0 = μ 0 H . The atoms of a diamagnetic substance have no intrinsic magnetic dipole moment. However, a magnetic dipole may be induced by the action of an external field. These induced dipoles ...
* Magnetic Scalar Potential * Magnetic Vector Potential
... The magnetic scalar potential is useful only in the region of space away from free currents. If J=0, then only magnetic flux density can be computed from the magnetic scalar potential The potential function which overcomes this limitation and is useful to compute B in region where J is present is ...
... The magnetic scalar potential is useful only in the region of space away from free currents. If J=0, then only magnetic flux density can be computed from the magnetic scalar potential The potential function which overcomes this limitation and is useful to compute B in region where J is present is ...
Oscillating Magnetic Dipole in an Inhomogeneous Magnetic Field
... dipoles, which are more or less parallel. However, since it is impossible to measure I , in the loop around A = π2 , on an atomic level, one has to determine the total magnetic moment mp for the entire permanent magnet. Using superposition, mp can be expressed as the vector sum of all the dipoles ...
... dipoles, which are more or less parallel. However, since it is impossible to measure I , in the loop around A = π2 , on an atomic level, one has to determine the total magnetic moment mp for the entire permanent magnet. Using superposition, mp can be expressed as the vector sum of all the dipoles ...
2-17 Magnetic Field: Causes
... magnetic field is essentially zero. In some atoms, such as iron, cobalt, and neodymium, the various contributions to the magnetic field do not cancel out. In such cases, the observed total magnetic field of the atom is a dipole magnetic field, and, the atom behaves as a magnetic dipole. Substances c ...
... magnetic field is essentially zero. In some atoms, such as iron, cobalt, and neodymium, the various contributions to the magnetic field do not cancel out. In such cases, the observed total magnetic field of the atom is a dipole magnetic field, and, the atom behaves as a magnetic dipole. Substances c ...
Magnetic Magic Teacher Guide
... volcanoes and found the same to be true. There are two ways this could have happened—the continent moved, or the magnetic pole moved. At the time these experiments took place, scientists already knew that the pole moved. But the data they found in the lava was not consistent with pole movement being ...
... volcanoes and found the same to be true. There are two ways this could have happened—the continent moved, or the magnetic pole moved. At the time these experiments took place, scientists already knew that the pole moved. But the data they found in the lava was not consistent with pole movement being ...
Physics - Magnetism
... This documentary by PBS discusses the source of the Earth's magnetic field, as well as the changes and fluxuations in the field that scientists have observed over time. This video not only offers information about the Earth's magnetic field, but also offers insight into future effects of magnetic ch ...
... This documentary by PBS discusses the source of the Earth's magnetic field, as well as the changes and fluxuations in the field that scientists have observed over time. This video not only offers information about the Earth's magnetic field, but also offers insight into future effects of magnetic ch ...
Physics 1002 – Magnetic Fields (Read objectives on screen
... We know that a magnetic field surrounds the earth, and its shape is like one that would surround a strong bar magnet placed at the earth’s center, like this. But to answer to the question, “Where does the earth’s magnetic field come from?”: We’re not sure. We know there is not a magnetized hunk of i ...
... We know that a magnetic field surrounds the earth, and its shape is like one that would surround a strong bar magnet placed at the earth’s center, like this. But to answer to the question, “Where does the earth’s magnetic field come from?”: We’re not sure. We know there is not a magnetized hunk of i ...
MAGNETIC TOROUE: Experimenting with the magnetic dipole
... disadvantages of using a solenoid are: 1)The power consumption and heat developed become problems even for rather low fields. 2) It is hard to bring instrumentation in from the side because the coil is in the way. A compromise between field intensity and uniformity is to use a pair of coils, equival ...
... disadvantages of using a solenoid are: 1)The power consumption and heat developed become problems even for rather low fields. 2) It is hard to bring instrumentation in from the side because the coil is in the way. A compromise between field intensity and uniformity is to use a pair of coils, equival ...
Experiment 5: Magnetic Fields of a Bar Magnet and of the Earth
... Tape a piece of brown paper (provided) onto your table. Stay far away from any iron objects. Place a bar magnet about 3 inches from the far side of the paper, as shown in Figure 1. Trace the outline of the magnet on the paper. 7 3 inches, more or less ...
... Tape a piece of brown paper (provided) onto your table. Stay far away from any iron objects. Place a bar magnet about 3 inches from the far side of the paper, as shown in Figure 1. Trace the outline of the magnet on the paper. 7 3 inches, more or less ...
MAGNETIC PROPERTIES OF MATERIALS
... The loop is generated by measuring the magnetic flux B of a ferromagnetic material while the magnetizing force H is changed. A ferromagnetic material that has never been previously magnetized or has been thoroughly demagnetized will follow the dashed line as H is increased. As the line demonstrates ...
... The loop is generated by measuring the magnetic flux B of a ferromagnetic material while the magnetizing force H is changed. A ferromagnetic material that has never been previously magnetized or has been thoroughly demagnetized will follow the dashed line as H is increased. As the line demonstrates ...
Seafloor magnetic stripes: look again
... individual reversal events taking only a couple thousand years. These observations argue for a mechanism within the Earth's interior that continually generates the geomagnetic field. It has long been speculated that this mechanism is a convective dynamo operating in the Earth's fluid outer core, whi ...
... individual reversal events taking only a couple thousand years. These observations argue for a mechanism within the Earth's interior that continually generates the geomagnetic field. It has long been speculated that this mechanism is a convective dynamo operating in the Earth's fluid outer core, whi ...
EM4: Magnetic Hysteresis
... Rather, it reaches a saturation value Bs as the magnetic field H increases. The relative permeability µr of the ferromagnet depends on the magnetic field strength H, and also on the previous magnetic treatment of the ferromagnet. In a demagnetized ferromagnet, the magnetic field strength is B = 0 T ...
... Rather, it reaches a saturation value Bs as the magnetic field H increases. The relative permeability µr of the ferromagnet depends on the magnetic field strength H, and also on the previous magnetic treatment of the ferromagnet. In a demagnetized ferromagnet, the magnetic field strength is B = 0 T ...
chapter19_PC
... magnetic field is believed to be electric currents in the liquid part of the core ...
... magnetic field is believed to be electric currents in the liquid part of the core ...
Magnetosphere of Saturn
The magnetosphere of Saturn is the cavity created in the flow of the solar wind by the planet's internally generated magnetic field. Discovered in 1979 by the Pioneer 11 spacecraft, Saturn's magnetosphere is the second largest of any planet in the Solar System after Jupiter. The magnetopause, the boundary between Saturn's magnetosphere and the solar wind, is located at a distance of about 20 Saturn radii from the planet's center, while its magnetotail stretches hundreds of radii behind it.Saturn's magnetosphere is filled with plasmas originating from both the planet and its moons. The main source is the small moon Enceladus, which ejects as much as 1,000 kg/s of water vapor from the geysers on its south pole, a portion of which is ionized and forced to co-rotate with the Saturn’s magnetic field. This loads the field with as much as 100 kg of water group ions per second. This plasma gradually moves out from the inner magnetosphere via the interchange instability mechanism and then escapes through the magnetotail.The interaction between Saturn's magnetosphere and the solar wind generates bright oval aurorae around the planet's poles observed in visible, infrared and ultraviolet light. The aurorae are related to the powerful saturnian kilometric radiation (SKR), which spans the frequency interval between 100 kHz to 1300 kHz and was once thought to modulate with a period equal to the planet's rotation. However, later measurements showed that the periodicity of the SKR's modulation varies by as much as 1%, and so probably does not exactly coincide with Saturn’s true rotational period, which as of 2010 remains unknown. Inside the magnetosphere there are radiation belts, which house particles with energy as high as tens of megaelectronvolts. The energetic particles have significant influence on the surfaces of inner icy moons of Saturn.In 1980–1981 the magnetosphere of Saturn was studied by the Voyager spacecraft. As of 2010 it is a subject of the ongoing investigation by Cassini mission, which arrived in 2004.