AQA GCSE Physics Sample Pages
... Some metals, for example iron, steel, cobalt and nickel, are magnetic. A magnet will attract them. If you drop some steel pins on the floor you can pick them up using a magnet. A magnetic force is an example of a non-contact force, which acts over a distance. In Figure 5.4, you can see a bar magnet ...
... Some metals, for example iron, steel, cobalt and nickel, are magnetic. A magnet will attract them. If you drop some steel pins on the floor you can pick them up using a magnet. A magnetic force is an example of a non-contact force, which acts over a distance. In Figure 5.4, you can see a bar magnet ...
luminescence studies of rare earth (europium) doped nano
... nanophosphor in a short interval of time. Keywords: Luminescence, nano-alumina, phosphor. 1. Introduction: The optical properties of rare-earth (RE) ions in different host materials have been extensively studied for several years. Although there are several reports on this subject, in recent years, ...
... nanophosphor in a short interval of time. Keywords: Luminescence, nano-alumina, phosphor. 1. Introduction: The optical properties of rare-earth (RE) ions in different host materials have been extensively studied for several years. Although there are several reports on this subject, in recent years, ...
Facts About Magnets and Magnetism
... Facts About Magnets and Magnetism A magnet is a rock or metal that has the power to attract certain other metals like iron and steel: A typical magnet has two poles, or ends, called the north and south poles. Two like poles always repel, or push away, from each other. Two unlike, or opposite, poles ...
... Facts About Magnets and Magnetism A magnet is a rock or metal that has the power to attract certain other metals like iron and steel: A typical magnet has two poles, or ends, called the north and south poles. Two like poles always repel, or push away, from each other. Two unlike, or opposite, poles ...
Electromagnetic parameter retrieval from inhomogeneous
... We discuss the validity of standard retrieval methods that assign bulk electromagnetic properties, such as the electric permittivity and the magnetic permeability , from calculations of the scattering 共S兲 parameters for finite-thickness samples. S-parameter retrieval methods have recently become ...
... We discuss the validity of standard retrieval methods that assign bulk electromagnetic properties, such as the electric permittivity and the magnetic permeability , from calculations of the scattering 共S兲 parameters for finite-thickness samples. S-parameter retrieval methods have recently become ...
L9 Tensor properties, anisotropy, part 2
... externally applied field(s). Thermodynamics then provides the means and rules to determine how the energy of a solid/liquid/ gas changes when the external conditions change. Thermodynamics often assumes that a material system is homogeneous and isotropic and then makes quite general statements about ...
... externally applied field(s). Thermodynamics then provides the means and rules to determine how the energy of a solid/liquid/ gas changes when the external conditions change. Thermodynamics often assumes that a material system is homogeneous and isotropic and then makes quite general statements about ...
The physics of manganites: Structure and transport
... Depending on the composition they show a variety of magnetic and electric phenomena, including ferromagnetic, antiferromagnetic, charge, and orbital ordering. If the site A is partially occupied by two different atoms, one trivalent as, for example, La and one divalent as Ca, then Mn3⫹ and Mn4⫹ coex ...
... Depending on the composition they show a variety of magnetic and electric phenomena, including ferromagnetic, antiferromagnetic, charge, and orbital ordering. If the site A is partially occupied by two different atoms, one trivalent as, for example, La and one divalent as Ca, then Mn3⫹ and Mn4⫹ coex ...
Electromagnetic Induction
... Though in general the direction of induced emf or current is determined by Lenz's law, in case of motion of a straight conductor in a magnetic field it can also be determined by the so called 'Fleming's right hand rule', according to which if one stretches the fore finger, the central finger and the ...
... Though in general the direction of induced emf or current is determined by Lenz's law, in case of motion of a straight conductor in a magnetic field it can also be determined by the so called 'Fleming's right hand rule', according to which if one stretches the fore finger, the central finger and the ...
Magnetism and Static Electricity WebQuest
... Use your textbook along with the online sources listed in this PowerPoint to answer the questions in your packet. Many of the websites repeat the same information. Use that repetition to help reinforce your understanding of each topic. Complete the REVIEW AND REINFORCE worksheets in your packet as y ...
... Use your textbook along with the online sources listed in this PowerPoint to answer the questions in your packet. Many of the websites repeat the same information. Use that repetition to help reinforce your understanding of each topic. Complete the REVIEW AND REINFORCE worksheets in your packet as y ...
Synthesis and Nuclear Magnetic Resonance Spectra of ISN
... nitrogens in the Ph3E=N-S3N3 (E = P, As) suggest that the N M R technique will be a useful diagnostic structural probe indicate a direct dependence. Obviously the subject of 6/A for other monosubstituted S3N3derivatives. correlations is more complex in these molecules than in simple I5N Chemical Shi ...
... nitrogens in the Ph3E=N-S3N3 (E = P, As) suggest that the N M R technique will be a useful diagnostic structural probe indicate a direct dependence. Obviously the subject of 6/A for other monosubstituted S3N3derivatives. correlations is more complex in these molecules than in simple I5N Chemical Shi ...
Unit 13 - Magnetism
... a ferromagnetic material. The information stored here is digital (a region is either magnetic or not); in other applications, it can be analog (with a varying strength), such as on audiotapes. ...
... a ferromagnetic material. The information stored here is digital (a region is either magnetic or not); in other applications, it can be analog (with a varying strength), such as on audiotapes. ...
The History Of Maxwell`s Equations
... one end of the magnet to the other. Faraday saw this pattern and thought that these “lines of force,” as he called them, must be the key to electromagnetism. When he induced an electric current in a wire with a magnet, he saw this line of force curving around the wire, as we now know is the case. ...
... one end of the magnet to the other. Faraday saw this pattern and thought that these “lines of force,” as he called them, must be the key to electromagnetism. When he induced an electric current in a wire with a magnet, he saw this line of force curving around the wire, as we now know is the case. ...
Electromagnetic Waves Plane Waves Polarization
... where Z = µ/ is an impediance. p The impediance of free space is µ0 /0 = 376.7 Ω. We have not specified that k and ω are real, which one or the other might not be, as the permittivity and permeability are in general complex. Still, in many contexts they are close to real and if we take ~k to be re ...
... where Z = µ/ is an impediance. p The impediance of free space is µ0 /0 = 376.7 Ω. We have not specified that k and ω are real, which one or the other might not be, as the permittivity and permeability are in general complex. Still, in many contexts they are close to real and if we take ~k to be re ...
A Faraday Cage Exploration:
... Do you know why cell phone reception is so weak inside an elevator? All of these puzzling concepts can be explained by electricity, and its behavior within metals. Let’s begin with the first topic: the painful shocks that result from static electricity, a build-up of electric charge. The atoms that ...
... Do you know why cell phone reception is so weak inside an elevator? All of these puzzling concepts can be explained by electricity, and its behavior within metals. Let’s begin with the first topic: the painful shocks that result from static electricity, a build-up of electric charge. The atoms that ...
Плеханов В
... than an order of magnitude at the transition from 7Li to 6Li when the cooling to zero. At the transition from 12С to 13С the self-diffusion coefficient is three orders of magnitude less [9]. The vaporization enthalpy growth at the transition CD3OH, CH3OH, CH3OD shows that intermolecular interactions ...
... than an order of magnitude at the transition from 7Li to 6Li when the cooling to zero. At the transition from 12С to 13С the self-diffusion coefficient is three orders of magnitude less [9]. The vaporization enthalpy growth at the transition CD3OH, CH3OH, CH3OD shows that intermolecular interactions ...
Electric Art From Electromagnetism to Electrodynamics
... of the two charges, q1 and q2, falling also as the square of the distance. We can express this as ...
... of the two charges, q1 and q2, falling also as the square of the distance. We can express this as ...
Multiferroics
Multiferroics have been formally defined as materials that exhibit more than one primary ferroic order parameter simultaneously (i.e. in a single phase), and many researchers in the field consider materials to be multiferroics only if they exhibit coupling between primary order parameters. However, the definition of multiferroics can be expanded to include non-primary order parameters, such as antiferromagnetism or ferrimagnetism.The four basic primary ferroic order parameters areferromagnetismferroelectricityferroelasticityferrotoroidicityThe last is a topic of some debate, as there was no evidence for switching ferrotoroidicity until recently.Many multiferroics are transition metal oxides with perovskite crystal structure, and include rare-earth manganites and -ferrites (e.g. TbMnO3, HoMn2O5, LuFe2O4 and recently, ""PZTFT"",). Other examples are the bismuth compounds BiFeO3 and BiMnO3, non-perovskite oxide LiCu2O2, and non-oxides such as BaNiF4 and spinel chalcogenides, e.g. ZnCr2Se4. These alloys show rich phase diagrams combining different ferroic orders in separate phases.Apart from single phase multiferroics, composites and heterostructures exhibiting more than one ferroic order parameter are studied extensively. Some examples include magnetic thin films on piezoelectric PMN-PT substrates and Metglass/PVDF/Metglass trilayer structures.Besides scientific interest in their physical properties, multiferroics have potential for applications as actuators, switches, magnetic field sensors or new types of electronic memory devices.