Magnetism

Results An initial resistance versus magnetic field measurement on NdMo16O44 reveals a pronounced magnetic hysteresis effect when a magnetic field is applied perpendicular to the current, but with unknown orientation with respect to the crystal axes, as shown in Fig. 2a for temperatures from 12K to 30K (at temperature below 12K, the overall resistance is too high to produce low-noise measurements with resolvable magnetoresistance features). The individual plots are offset to better show the…

What is a circuit? How do they work? An electric circuit is a kind of path made up of wires that allows the flow of electrons. The circuit has to be made in a circular form, as the electrons must frequently move in a full loop, in which they will return to their original position and then complete the loop again. (“What is an electric circuit?”) The battery or another source of power provides the voltage, or ‘electrical push’, that makes the electrons move through the circuit. When the electrons…

In this equation, x and y denotes the number of moles of RE and Mn atoms per formula unit of the structure, respectively. The RE and Mn represent the theoretical magnetic moment of trivalent free RE3+ ions and divalent Mn2+ ions respectively. The experimental values of total magnetic moments were found to be smaller than the calculated values (Table xyz). The crystal field effects can lead to lower value of magnetic moments for RE3+ ions in these compositions as compared to free RE3+ ions,…

different types of magnets. Once we returned to the classroom, several students made statements about characteristics and abilities of magnets that they believed true. As I stood back and listened, I realized that I needed to prepare a lesson on magnetism to clear up students’ misconceptions about the power of magnets. One week later, I collected many items made from different…

Power Point Script With the variety of topics covered in the curriculum over the last year, there was one topic that stood out to me the most, electricity. There was something very curiosity inducing about the fundamental forces that enables electricity to do wonders in the world. Outside of the realm of the studied curriculum, there is a whole chapter on the nature of induced forces in magnetic fields. This struck great interest and lead to further research. In the 1830’s, an English…

3. Objective In this project, a coordination compound, [Co(II)EDTA]2− will be prepared and its magnetic moment will be determined by NMR spectroscopy. A full picture of the clock behaviour will be presented through the combination of measurements provided by NMR spectroscopy alongside those obtained using more orthodox techniques such as UV spectrometry and pH measurements. The experiment in Dr. Evans paper will replicated using the same measurements and techniques. This project is to serve as a…

What was the horsepower calculated? Does this make sense? The horsepower calculated when running up the stairs was 0.67 hp. This makes sense as 1 hp was originally defined to be the approximate amount of work a strong dray horse could do while lifting coal for one minute (The Editors of Encyclopædia Britannica, n.d). It is, therefore, reasonable to assume that a human could do 67% of this amount of work for a shorter amount of time. Generator What would happen to the force required to turn…

In this report I will explain how a motor works. Fig. 1 shows the parts of the motor. In this motor, there are two field magnets on each side coil with wire. These two field magnets always have opposite polarity. On the middle of the motor there is an armature, two commutators and two brushes. When current flow though the two brushes, one of the brushes touches commutator plate 1 and the other brushes touches commutator plate 2. Then the armature A and armature B turn in to field magnets,…

Magnetic therapy or magnet healing is a type of alternative medicine that have magnetic fields that generates healing powers towards a large number of diseases or conditions. These electromagnetic fields have been demonstrated to treat slow-healing fractures in the body and have shown good results towards to a few conditions. The website that has claimed to use this magnetic therapy are Skepdic.com. The claim that this complementary and alternative medicine practitioner is making goes…

Instructional Decision Making When designing a plan for instruction, it is imperative to be flexible since there are a variety of factors that may derail your lessons. Although important to the function of the school, assemblies, special programs, and extraordinary events are just a few examples of the countless variables that may affect the lesson plans that is beyond the control of the classroom teacher. Additionally, the teacher must be flexible since every aspect of a lesson does not…