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TS 2012 18 dosage TP dosage du permanganate par les ions ferreux
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=3PgAhleLqAI
www.apniphysics.com • Aim of the experiment is to Measure the Magnetic Susceptibility of FeCl3 solution by Quinke's Method. • In this experiment we have used An electro magnet, its power supply, A Gauss Meter, along with a probe and Qunike's Tube (or U-tube) with FeCl3 solutions. By the help of Gauss Probe one can measure the magnetic field intensity (H) in the unit of Gauss. (1 Tesla= 10^4 Gauss). • What we have to do, first we have to calibrate the magnetic field by providing the current and as a result the magnetic field intensity. After the calibration, we have to start the experiment, the important point to perform the experiment is to measure the reading for small h i.e. height of the solution in case of rise and fall from the standard value, which means the level in the absence of the external magnetic field. • When you calibrate the magnetic field then insert the Qunike's tube in between the magnetic poles properly. If the two arms are very close to the U- tube, it is possible that both can be affected by the magnetic field and as a result no remarkable changes in the height of the liquid level. But suppose if there is enough separation between the arms then you put any of the arms in the uniform magnetic field, which as a result you will see the raises in level and on the other hand fall off the level. • Here in this experiment level falls as a result of applying the magnetic field from the equilibrium position (that position of the level, when there was no magnetic field). Now how much it raises or falls from the central position by applying the external magnetic field we have to note down respectively. For example the magnetic field intensity at one amp of the current, then at 2 Amp, 3 Amp, and so on, and further as a result of the change in level. So, there are only three variables; one is current, the second is the magnetic field intensity and the third one is the change in heights of the solution level. • We have to record that data for the calculation of susceptibility. After making the observation now the points are • (a). Why does the level of solution rise up or fall down in the presence of a magnetic field and • (b) second how to derive the formula to measure the susceptibility • For (a) you can see the second part of the video where I have to consider force along the x-axis, the direction in which we see the change in level. Also, the Z-axis is the direction of the magnetic field. The level rises up or falls down because of this force that arises in the presence of an external magnetic field on the magnetic dipole. • for the (b) part you see the idea of force on magnetic dipole which is balanced by the pressure exerted over area A due to a height difference of 2h between the liquid surfaces in the two arms of the U-tube. • Now in this experiment, we define and measure the susceptibility as a ratio of the Intensity of magnetization of the material to the intensity of the external magnetic field. Now here to understand the susceptibility we have to Understand the intensity of magnetization, What is this? It is discussed in the second part of the video. • The other supporting videos are • Electron Spin Magnetic Moment and Magnetic Susceptibility • • Electron Spin Magnetic Moment and Mag... • How to Explain Magnetic Susceptibility and its Mathematical Formulation • • How to Explain Magnetic Susceptibilit... • EXPERIMENTAL DETAILED CALCULATION • • apniPhysics| Susceptibility Calculati...
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