# Magnetic stirrer

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Field strength or intensity is the force which maintains the magnetic flux and produces a particular value of the flux density B at that point in a magnetic field. Therefore the flux density is the cause while the flux density (B) is the effect. The flux density can be assumed proportionally to the field intensity in a magnetic field which comes in three parts. First part is: Where U stands for the permeability of force (the measure of the degree to which the magnetic line of force can penetrate the material). The value of magnetic space constant is B is the magnetic flux density while H is magnetic intensity. Flux density depends on the native of the medium. The relate permeability of the medium is Ur. Therefore the formula for flux density at any point in a magnetic field is: B = UoUrH The ratio of flux density to field density is not constant but varies with flux density in…

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to be induced in the other wire. This discovery about electromagnetic induction redefined the sources of electricity at that time. The second experiment was done by scattering iron filings onto a surface followed by placing a magnet on them. It was observed that the iron filings moved in the magnetic field in a pattern that loops from one end of magnet to the other. Faraday termed these lines he saw the “lines of forces”. (Holton and Brush, 2001) Despite the other contemporary mathematicians…

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In the India, the electricity supply in 60 Hz and the other country like as Europe in many places use 50 Hz alternative current electricity. Power line interference occurs through two mechanisms: capacitive and inductive coupling. Capacitive coupling refers to the transfer of energy between two circuits by means of a coupling capacitance present between the two circuits. The value of the coupling capacitance decreases with increasing separation of the circuits. Inductive coupling on the other…

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Brushless DC Motor Physics Report. Isaac Mills. Motor: A machine powered by electrical current or the explosion of gases inside chambers that will provide movement for a vehicle. When an electric current, magnetic field or external force acts on a coil found inside of the motor, it will provide force to it, thus causing the coil to move, the coil rotates on a half turn basis otherwise the motor is forced to stop and will not move. The Motor Effect Motor effect refers to a current carrying…

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The M-H loops for samples Ba0.75Ca0.25PrxFe12-xO19 with different concentration of Pr (x=0.0, 0.5, 1.0, 1.5, 2.0) have been represented in Fig 4. The measured values of saturation magnetization ‘Ms’, remanence ‘Mr’ and coercivity ‘Hc’ are listed in Table 2. The measured values of saturation magnetization ‘Ms’ for all the samples were observed in the range of (60.12-65.14) emu/g and observed values of remanence ‘Mr’ were in the range of (39.31-46.80) emu/g. The Mr/Ms ratio for all the samples…

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Monday, the start of yet another school day. Another day where he 's absent. Another day not learning anything. Another day where he won 't see and talk to his friends again. The opened window brought in cool air, swirling around the average hospital room. Unfortunately, this made the eleven-year-old boy shiver nonstop and his teeth clattering like a skeleton would. His front bangs of his silver-dyed hair brushed upwards, for the air sometimes liked to mess around with it, showing the child 's…

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power of the motor. However, excessive increase in disk thickness can highlight the circumferential component of flux, which in turn undermines the motor performance. C. Number of hysteresis disks adjacent to each stator The differences between single-sided motors (in which there is only one hysteresis disk in vicinity of each stator) and double-sided motors (in which there are disks on both sides of each stator) are interesting. For this purpose, single-sided motors M1, M2, M3, M7 and M8 are…

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Electricity wasn’t invented it is already occurred in the nature. It was just discovered by Benjamin Franklin. His experiments (famous kite experiment) helped in building the connection between the electricity and lightning. In his experiment with kite included a kite with the key tie to the end of kite, which is connected to the Leyden jar. When the lighting struck the kite, the electric current travel down the string through the key and into the Leyden jar. We wonder that “what is there in…

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Motors transform electrical energy to mechanical energy, hence they are essential for energy conversions in electrical machines. All types of electrical motors are made up of a stationary field referred to a stator and a rotating field referred to a rotor. According to Krishnan, (2010), DC motors operate through the interaction of an electric current with magnetic flux to generate a torque and rotational speed. D.C motors are of different types but they all operate…

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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 scientist named Michel Faraday was credited with the discovery of induced currents and the practical behind it. He first wrapped a copper wire around an iron ring. On one side of the ring, there was a battery with a switch. On the opposite side, there was a galvanometer. He noticed a strange pattern in variations in currents. This…

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