Week 2: Current and Intro to Circuits
... How does it work? Think about electricity – attraction vs repulsion ...
... How does it work? Think about electricity – attraction vs repulsion ...
18-1 Magnetism - Thomas C. Cario Middle School
... 4. What do the letters N and S stand for on the magnets? _________________________ ______________________________________________________________________________ ______________________________________________________________________________ 5. Based on the arrangement of the iron filings, where on t ...
... 4. What do the letters N and S stand for on the magnets? _________________________ ______________________________________________________________________________ ______________________________________________________________________________ 5. Based on the arrangement of the iron filings, where on t ...
Unit 3_electricity and magnetism_97
... how items become magnetic. Students will use their knowledge of electricity and magnetism to build circuits and electromagnets. I Can Statements Evidence I can describe the ways an atom can become electrically charged Intro to Electricity Practice I can explain the different types of current and des ...
... how items become magnetic. Students will use their knowledge of electricity and magnetism to build circuits and electromagnets. I Can Statements Evidence I can describe the ways an atom can become electrically charged Intro to Electricity Practice I can explain the different types of current and des ...
Lesson 2 - Electromagnetism
... Remember the trick: Just like Canadians in the winter, magnetic field lines like to go away from the North and towards the South. ...
... Remember the trick: Just like Canadians in the winter, magnetic field lines like to go away from the North and towards the South. ...
Document
... A current I in a conducting loop creates a magnetic field. The flux through the loop is proportional to the current, = LI . The constant of proportionality L is the selfinductance, which depends on the geometry of the loop. If I changes in time there is an induced emf around the loop, which is by ...
... A current I in a conducting loop creates a magnetic field. The flux through the loop is proportional to the current, = LI . The constant of proportionality L is the selfinductance, which depends on the geometry of the loop. If I changes in time there is an induced emf around the loop, which is by ...
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.