Unit 3 - eduBuzz.org
... F m-1 or C2 N-1 m-2 . So the constant of proportionality in Equation 1.1 is , which 4πε0 has the value 8.99 × 10 9 N m2 C-2 . This force is called the electrostatic or Coulomb force. It is important to remember that force is a vector quantity, and the direction of the Coulomb force depends on the si ...
... F m-1 or C2 N-1 m-2 . So the constant of proportionality in Equation 1.1 is , which 4πε0 has the value 8.99 × 10 9 N m2 C-2 . This force is called the electrostatic or Coulomb force. It is important to remember that force is a vector quantity, and the direction of the Coulomb force depends on the si ...
Episode 118 - Teaching Advanced Physics
... combination of R1 and R load (less than R1) so a smaller fraction of the voltage is ‘tapped off’. If Rload >> R1 then there is no significant effect on the output voltage. It is worth going back to their experiences as younger pupils tackling simple circuits, and considering what was happening when ...
... combination of R1 and R load (less than R1) so a smaller fraction of the voltage is ‘tapped off’. If Rload >> R1 then there is no significant effect on the output voltage. It is worth going back to their experiences as younger pupils tackling simple circuits, and considering what was happening when ...
Developer Notes
... 3. Both attract non-charged objects by inducing fields in them. 4. Both can pass a charge to another object through contact. 5. Both have energy. Magnets are just a lot easier to see than electrons and protons. Here is the sequence of concepts: 1. Some objects are not magnetic. 2. There are two pole ...
... 3. Both attract non-charged objects by inducing fields in them. 4. Both can pass a charge to another object through contact. 5. Both have energy. Magnets are just a lot easier to see than electrons and protons. Here is the sequence of concepts: 1. Some objects are not magnetic. 2. There are two pole ...
Magnetic Mysteries
... a. Show the bar magnet to your students. Let them place it on a metal surface so that they can see that it is magnetically strong on all four of its sides. b. Use the piece of magnetic field viewing film to show that the poles are located on the two faces. c. Place a steel plate on each face of the ...
... a. Show the bar magnet to your students. Let them place it on a metal surface so that they can see that it is magnetically strong on all four of its sides. b. Use the piece of magnetic field viewing film to show that the poles are located on the two faces. c. Place a steel plate on each face of the ...
KJM-MENA 3120 Structure and properties of functional materials
... cation fits perfectly into the interstice (hole) made up by the anions, or when the cation is slightly larger – pushing towards the anions in contact. Obviously one may calculate the ideal Rcation/Ranion ratio for perfect size fitting, Figure 2. In these considerations atoms are considered as rigid ...
... cation fits perfectly into the interstice (hole) made up by the anions, or when the cation is slightly larger – pushing towards the anions in contact. Obviously one may calculate the ideal Rcation/Ranion ratio for perfect size fitting, Figure 2. In these considerations atoms are considered as rigid ...
Increased superconductivity for CNT doped
... Due to the anisotropy of the susceptibility, composites align in when the anisotropy energy, high magnetic fields is larger than the energy of thermal dis, where is the volume of an individual ordering effects, is the applied magnetic field, and is particle, the anisotropy of susceptibility [11]. St ...
... Due to the anisotropy of the susceptibility, composites align in when the anisotropy energy, high magnetic fields is larger than the energy of thermal dis, where is the volume of an individual ordering effects, is the applied magnetic field, and is particle, the anisotropy of susceptibility [11]. St ...
3. CURRENT ELECTRICITY
... 24. Define the terms electric energy and electric power. Give their units. Ans. Electric energy:-The total work done by the source of emf in maintaining an electric current in a circuit for a given time is called electric energy consumed in the circuit. Its SI unit is joule. Electric power:-The rate ...
... 24. Define the terms electric energy and electric power. Give their units. Ans. Electric energy:-The total work done by the source of emf in maintaining an electric current in a circuit for a given time is called electric energy consumed in the circuit. Its SI unit is joule. Electric power:-The rate ...
Review Question Ch 22 Test
... electrons each having an electric potential of 5.5 x 10-19 J. What is the distance? ans: 2.6 x 1039 m 23. The smaller the # gauge, the larger the cross-sectional surface area. Which has greater resistance, 16-gauge or 8-gauge? ans: 16-gauge, smallest area 24. A 800 W oven runs off a 220 V circuit. W ...
... electrons each having an electric potential of 5.5 x 10-19 J. What is the distance? ans: 2.6 x 1039 m 23. The smaller the # gauge, the larger the cross-sectional surface area. Which has greater resistance, 16-gauge or 8-gauge? ans: 16-gauge, smallest area 24. A 800 W oven runs off a 220 V circuit. W ...
Giant magnetoresistance
Giant magnetoresistance (GMR) is a quantum mechanical magnetoresistance effect observed in thin-film structures composed of alternating ferromagnetic and non-magnetic conductive layers. The 2007 Nobel Prize in Physics was awarded to Albert Fert and Peter Grünberg for the discovery of GMR.The effect is observed as a significant change in the electrical resistance depending on whether the magnetization of adjacent ferromagnetic layers are in a parallel or an antiparallel alignment. The overall resistance is relatively low for parallel alignment and relatively high for antiparallel alignment. The magnetization direction can be controlled, for example, by applying an external magnetic field. The effect is based on the dependence of electron scattering on the spin orientation.The main application of GMR is magnetic field sensors, which are used to read data in hard disk drives, biosensors, microelectromechanical systems (MEMS) and other devices. GMR multilayer structures are also used in magnetoresistive random-access memory (MRAM) as cells that store one bit of information.In literature, the term giant magnetoresistance is sometimes confused with colossal magnetoresistance of ferromagnetic and antiferromagnetic semiconductors, which is not related to the multilayer structure.